Search Results

Abstract

Objetivo: Analisar os resultados de um estudo comparativo entre as estratégias dinâmica e normal utilizando o perí-metro Octopus 1-2-3. Métodos: Utilizando o Octopus 1-2-3 nas estratégias dinâmica e normal foi realizada a perimetria automatizada em 24 pacientes glaucomatosos (8 homens e 16 mulheres) com uma média de intervalo entre os 2 exames de 6 meses. Todos pacientes já haviam sido previamente submetidos a pelo menos um exame de perimetria automatizada no Octopus 1-2-3. Os dados comparados, para ambos os olhos, foram: a idade do paciente, número de estímulos, sensibilidade média (MS), defeito médio (MD), perda localizada (LV), flutuação em curto prazo (SF) e o fator de confiabilidade (RF). Na análise estatística, utilizando o teste t pareado, somente os campos visuais com RF menor que 10 foram incluídos. O nível de significância foi igual a 5% (p < 0,05). Resultados: Não houve diferença estatisticamente significativa entre as duas estratégias em relação à idade, LV, SF e RF. Entretanto, houve diferença estatisticamente significativa na duração do teste, número de estímulos, MS e MD. A estratégia dinâmica mostrou uma sensibilidade difusa maior e um menor defeito médio quando comparada à estratégia normal. Conclusões: Nossos resultados indicam que os valores dos limiares medidos pela estratégia dinâmica estão em concordância com os valores obtidos utilizando a estratégia normal nos pacientes portadores ou suspeitos de glaucoma, cujos campos visuais estão normais ou limítrofes. Estes resultados também confirmam a redução na duração do exame. Também sugerem que, quando compararmos campos visuais realizados com a estratégia dinâmica com aqueles realizados com a estratégia normal, é necessária cautela em relação aos valores do MS e MD.

Keywords: Perimetria automatizada; Glaucoma; Octopus 1-2-3

Abstract

Objetivo: Estudar a influência do equivalente esférico nos valores obtidos pelo GDX TM Scanning Laser System®. Métodos: Foram avaliados 41 olhos de 41 voluntários sem doenças oculares e com campo visual sem alterações. Foi realizada a polarimetria de varredura a laser com o GDX TM Scanning Laser System® de acordo com as instruções contidas no manual do aparelho. Foram comparados os valores obtidos nesse exame em um grupo de pacientes com equivalente esférico positivo e em um outro com este valor nulo ou negativo, pelo teste de Mann-Whitney. Resultados: Não se verificou diferença estatística entre os valores obtidos nos olhos de pacientes do grupo I e os do grupo II. Não foi encontrada correlação entre o equivalente esférico e os valores obtidos com o GDX TM Scanning Laser System®. Conclusões: Na amostra estudada não houve diferença estatística entre os valores obtidos em um grupo de olhos com equivalente esférico positivo e outro com este valor negativo ou nulo, usando-se o GDX TM Scanning Laser System®.

Keywords: Polarimetria; Camada de fibras nervosas; Equivalente esférico

Abstract

Objetivo: O setor nasal do ângulo da câmara anterior pode apresentar maior densidade de canais coletores, o que pode influenciar no resultado de cirurgias angulares. Considerando as diferenças anatômicas no ângulo da câmara anterior, comparamos os resultados das abordagens de trabeculoplastia seletiva a laser nasal e temporal de 180 graus no glaucoma de ângulo aberto.
Métodos: Revisão retrospectiva de prontuários de pacientes com glaucoma de ângulo aberto (primária, pseudoexfoliação e pigmentar), que realizaram pelo menos uma sessão de trabeculoplastia seletiva a laser de 180 graus entre dezembro/2016 e outubro/2018. O setor nasal (N1) ou temporal (T1) foi escolhido a critério do médico. Os pacientes que não apresentaram diminuição da pressão intraocular (PIO) entre 3 e 6 meses foram retratados com trabeculoplastia seletiva a laser de 180 graus no setor de ângulo oposto (T2 e N2). O principal resultado medido foi a diminuição da pressão intraocular no 6º mês de acompanhamento após a última trabeculoplastia seletiva a laser. Uma análise de regressão multivariável avaliou os fatores associados à redução da pressão intraocular após o tratamento.
Resultados: O procedimento foi realizado inicialmente em 45 olhos (N1=25, T1=20 olhos), e repetido no setor ângulo da câmara anterior oposto em 19 olhos (N2 = 11, T2 = 8 olhos). Os testes ANOVA mostraram que apenas a abordagem N1 apresentou diferença significativa na diminuição da pressão intraocular em relação a T1, N2 e T2 (p=0,0014). A pressão intraocular basal (p=0,021) e o setor ângulo da câmara anterior (N1; p=0,044) se correlacionaram com a diminuição da pressão intraocular.
Conclusão: A trabeculoplastia seletiva a laser de 180 graus realizado inicialmente no setor nasal foi associado a uma diminuição mais significativa da pressão intraocular em comparação com a abordagem temporal. Considerando as diferenças setoriais no ângulo da câmara anterior, mais estudos prospectivos são necessários para confirmar nossos achados e fornecer protocolos para trabeculoplastia seletiva a laser mais eficientes.

Keywords: Glaucoma de ângulo aberto; Terapia a laser/mé­todos; Pressão intraocular; Trabeculoplastia/métodos.

Abstract

PURPOSE: This study aimed to compare the safety and effectiveness of intraocular pressure reduction between micropulse transscleral cyclophotocoagulation and “slow cook” transscleral cyclophotocoagulation in patients with refractory primary open-angle glaucoma.
METHODS: We included patients with primary open angle glaucoma with at least 12 months of follow-up. We collected and analyzed data on the preoperative characteristics and postoperative outcomes. The primary outcomes were a reduction of ≥20% of the baseline value (criterion A) and/or intraocular pressure between 6 and 21 mmHg (criterion B).
RESULTS: We included 128 eyes with primary open-angle glaucoma. The preoperative mean intraocular pressure was 25.53 ± 6.40 and 35.02 ± 12.57 mmHg in the micropulse- and “slow cook” transscleral cyclophotocoagulation groups, respectively (p<0.001). The mean intraocular pressure was reduced significantly to 14.33 ± 3.40 and 15.37 ± 5.85 mmHg in the micropulse- and “slow cook” transscleral cyclophotocoagulation groups at the last follow-up, respectively (p=0.110). The mean intraocular pressure reduction at 12 months was 11.20 ± 11.46 and 19.65 ± 13.22 mmHg in the micropulse- and “slow cook” transscleral cyclophotocoagulation groups, respectively (p<0.001). The median preoperative logMAR visual acuity was 0.52 ± 0.69 and 1.75 ± 1.04 in the micropulse- and “slow cook” transscleral cyclophotocoagulation groups, respectively (p<0.001). The mean visual acuity variation was -0.10 ± 0.35 and -0.074 ± 0.16 in the micropulse- and “slow cook” transscleral cyclophotocoagulation, respectively (p=0.510). Preoperatively, the mean eye drops were 3.44 ± 1.38 and 2.89 ± 0.68 drugs in the micropulse- and “slow cook” transscleral cyclophotocoagulation groups, respectively (p=0.017), but those were 2.06 ± 1.42 and 1.02 ± 1.46 at the end of the study in the slow cook” and micropulse transscleral cyclophotocoagulation groups, respectively (p<0.001). The success of criterion A was not significant between both groups. Compared with 11 eyes (17.74%) in the slow cook” transscleral cyclophotocoagulation group, 19 eyes (28.78%) in the micropulse transscleral cyclophotocoagulation group showed complete success (p=0.171). For criterion B, 28 (42.42%) and 2 eyes (3.22%) showed complete success after micropulse- and slow cook” transscleral cyclophotocoagulation, respectively (p<0.001).
CONCLUSION: Both techniques reduced intraocular pressure effectively.

Keywords: Sclera/surgery; Glaucoma, open-angle/surgery; Ciliary body/surgery; Intraocular pressure; Laser coagulation/methods; Lasers, semiconductor; Comparative study; Effectiveness

Abstract

PURPOSE: To assess the one-year impact of prostaglandin analog (travoprost) on periorbital appearance and lower eyelid horizontal tension, compared with the contralateral eye treated with Pascal selective laser trabeculoplasty.
METHODS: This nested case-control study was derived from a non-inferiority randomized clinical trial comparing Pascal selective laser trabeculoplasty efficacy with travoprost in fellow eyes over 12 months. One eye received daily travoprost, while the contralateral eye underwent Pascal selective laser trabeculoplasty. Lower eyelid horizontal tension was measured using a validated digital imaging method, and prostaglandin-associated periorbitopathy signs were graded by masked observers. Statistical analyses included generalized estimating equations and the Mann–Whitney U test for nonparametric data, with p<0.05 considered significant.
RESULTS: Ten patients met the inclusion criteria for this subanalysis. Travoprost-treated eyes had significantly lower mean lower eyelid distension compared with Pascal selective laser trabeculoplasty-treated eyes (4.32 mm vs. 5.02 mm; mean difference: 0.70 mm; p<0.001). Prostaglandin-associated periorbitopathy scores were significantly higher in the travoprost group, reflecting more pronounced changes in ptosis, periorbital hyperpigmentation, and eyelid retraction.
CONCLUSIONS: Chronic use of prostaglandin analogs is associated with notable periorbital changes and increased lower eyelid tension, potentially affecting aesthetics and ocular function. Pascal selective laser trabeculoplasty may offer a safer profile for preserving periorbital anatomy while maintaining effective intraocular pressure control. Laser trabeculoplasty should be considered as an initial treatment when appropriate to minimize cosmetic and functional changes from chronic topical therapy.

Keywords: Prostaglandin analogs; Selective laser trabeculoplasty; Periorbitopathy; Eyelid tension; Glaucoma treatment

Abstract

PURPOSE: Glaucoma is one of the leading causes of irreversible blindness worldwide. When topical hypotensive agents or laser trabeculoplasty fail to adequately control the disease, escalation of therapy becomes necessary, with transscleral cyclophotocoagulation being one of the available options. Several variations of transscleral cyclophotocoagulation exist, including traditional continuous wave, MicroPulse, and slow-coagulation techniques. We propose a novel variation – custom slow-coagulation transscleral cyclophotocoagulation – which combines elements of both continuous wave and slow-coagulation approaches. This study aimed to evaluate the outcomes of this technique in patients with refractory glaucoma.
METHODS: This retrospective, interventional study included 104 eyes of 83 patients with refractory glaucoma who underwent custom slow-coagulation transscleral cyclophotocoagulation. Changes in intraocular pressure, visual acuity, the number of glaucoma medications, and postoperative complications were analyzed. A paired t test was used to compare changes in intraocular pressure and visual acuity, while the Wilcoxon signed-rank test was applied to categorical variables. Success rates following custom slow-coagulation transscleral cyclophotocoagulation were estimated using Kaplan–Meier survival analysis.
RESULTS: Mean intraocular pressure decreased significantly from 38.9 ± 15.8 mmHg at baseline to 16.3 ± 9.9 mmHg at Month 12 (p<0.001). The mean number of glaucoma medications also decreased significantly from 3.6 ± 0.6 to 1.8 ± 1.4 (p<0.001). No significant reduction in mean visual acuity was observed during follow-up.
CONCLUSIONS: Custom slow-coagulation transscleral cyclophotocoagulation effectively reduced baseline intraocular pressure and the number of glaucoma medications, with a low rate of complications and no decline in visual acuity over a 12-month follow-up period. This novel technique demonstrated a high safety profile in a Hispanic population and represents a low-cost, minimally invasive procedure with rapid recovery and promising efficacy in intraocular pressure control.

Keywords: Glaucoma/surgery; Sclera; Filtering surgery; Laser coagulation/methods; Lasers, semiconductor/therapeutic use; Intraocular pressure; Blindness/prevention & control; Vision, low/epidemiology; Visual acuity

Abstract

OBJETIVO: Glaucoma é a principal causa de cegueira irreversível no mundo. O pico da pressão intraocular é um dos principais fatores de risco para progressão do glaucoma, e o controle pressórico ainda é o único tratamento efetivo para todas as formas de glaucoma. O objetivo principal deste estudo é comparar a redução basal e do pico da pressão intraocular, obtidas através do Teste de Sobrecarga Hídrica, entre os dois olhos dos mesmos pacientes utilizando latanoprosta 0,005% em um olho e submetidos à aplicação de trabeculoplastia a laser seletiva no olho contralateral.
MÉTODOS: Este é um estudo prospectivo, intervencionista, longitudinal e randomizado. Trinta pacientes consecutivos, glaucomatosos, com pressão intraocular controlada em uso de monoterapia com latanoprosta, foram recrutados de um único centro oftalmológico. Os olhos dos pacientes foram randomizados e um olho foi selecionado para tratamento com trabeculoplastia a laser seletiva e olho contralateral tratado com colírio de latanoprosta 0,005%. Foram avaliados a pressão intraocular basal e pico de pressão intraocular um mês (Teste de Sobrecarga Hídrica 2) e seis meses (Teste de Sobrecarga Hídrica 3) após tratamento.
RESULTADOS: Não houve diferença estatística entre a pressão intraocular pré washout entre os olhos randomizados para trabeculoplastia a laser seletiva e latanoprosta, 13,6 ± 2,1 e 13,3 ± 1,8 mmHg, respectivamente (p=0,182). Em relação à pressão intraocular basal, não houve diferença estatística entre os grupos, tanto no Teste de Sobrecarga Hídrica 2 (p=0,689) e Teste de Sobrecarga Hídrica 3 (p=0,06). Não houve diferença estatística em relação ao pico de pressão intraocular entre os grupos trabeculoplastia a laser seletiva e latanoprosta, no Teste de Sobrecarga Hídrica 2 (p=0,771) e Teste de Sobrecarga Hídrica 3 (p=0,774).
CONCLUSÕES: Em resumo, nosso estudo demonsrou que a eficácia da redução pressórica é similar entre latanoprosta e trabeculoplastia a laser seletiva, e pacientes glaucomatosos que estão com a pressão intraocular clinicamente controlados com latanoprosta e trocam de tratamento para trabeculoplastia a laser seletiva mantém sua pressão intraocular controlada.

Keywords: Glaucoma; Pressão intraocular; Latanoprosta; Lasers

Abstract

PURPOSE: This study aimed to report the surgical outcomes and success predictors of micropulse transscleral cyclophotocoagulation in eyes with refractory glaucoma.
METHODS: This was a noncomparative, interventional case series. Patients with refractory glaucomas, defined as eyes with prior incisional glaucoma surgery failure and uncontrolled intraocular pressure, who underwent micropulse transscleral cyclophotocoagulation between March 2017 and June 2021 were enrolled. A minimum follow-up period of 6 months was required. Preoperative and postoperative intraocular pressure, number of hypotensive medications, surgical complications, and any subsequent related events were recorded. Success criteria were as follows: 1) intraocular pressure reduction ≥20% and intraocular pressure ≤18 mmHg; 2) intraocular pressure reduction ≥30% and intraocular pressure ≤15 mmHg. The need for topical hypotensive medications was not considered a failure.
RESULTS: Seventy-nine (79) eyes (79 patients; mean age, 57.5 ± 20.6 years) were included. Overall, the median follow-up duration was 12.0 (interquartile interval, 6–24) months, and the mean intraocular pressure was reduced from 22.8 ± 6.8 mmHg to 15.5 ± 5.6 mmHg at the last follow-up visit (p<0.001). The mean number of medications was reduced from 2.8 ± 0.7 to 2.0 ± 1.0 (p<0.01). At 12 months postoperatively, the success rates for criteria 1 and 2 were 54.9% and 49.7%, respectively. Aside from one case of corneal ulcer, which fully resolved with clinical treatment, and two cases of persistent hypotony (with no visual acuity loss during follow-up), no other vision-threatening complications were observed during the postoperative period. The magnitude of intraocular pressure reduction at 1 month (adjusted to preoperative intraocular pressure; HR=1.01; p=0.002).
CONCLUSION: Our findings suggest that micropulse transscleral cyclophotocoagulation is a relatively effective alternative for managing refractory glaucomas, with minor postoperative complications. In addition, the initial intraocular pressure reduction was a statistically significant predictor of 1-year success in patients undergoing micropulse transscleral cyclophotocoagulation.

Keywords: Intraocular pressure/physiology; Glaucoma, open-angle/surgery; Trabeculectomy; Laser coagulation/methods; Tonometry, ocular/methods; Postoperative complications; Antihypertensive agents/therapeutic use.

Abstract

Objetivo: Comparar os parâmetros de câmara anterior obtidos através da tomografia de coerência óptica de segmento anterior antes e após a iridectomia periférica a laser.
Métodos: Quatorze pacientes com fechamento angular primário e seis com glaucoma primário de ângulo fechado foram prospectivamente avaliados neste estudo. Gonioscopia e tomografia de coerência óptica de segmento anterior com DRI OCT Triton^®foram realizadas antes e após a iridectomia periférica a laser. Os seguintes parâmetros de tomografia de coerência óptica de segmento anterior, baseados na localização do esporão escleral, foram avaliados: ângulo de abertura angular a 250 µm, 500 µm e 750 µm, área do espaço entre a íris e o trabeculado a 500 µm, ângulo entre a íris e o trabeculado, extensão do contato entre a íris e o trabeculado e curvatura da íris.
Resultados: A tomografia de coerência óptica de segmento anterior identificou 61% dos indivíduos com dois ou mais quadrantes fechados. A gonioscopia identificou mais quadrantes com ângulo fechado do que tomografia de coerência óptica de segmento anterior antes da iridectomia periférica a laser. Quanto aos parâmetros angulares, apenas ângulo de abertura angular a 250 µm no quadrante nasal não aumentou significativamente após a iridectomia periférica a laser. A curvatura da íris e a extensão do contato entre a íris e o trabeculado apresentaram redução significativa induzida pelo procedimento a laser. Mesmo nos olhos em que a gonioscopia não identificou aumento da amplitude angular após iridectomia periférica a laser (n=7), ângulo de abertura angular a 750 µm aumentou (nasal: 0,15 ± 0,10 mm para 0,27 ± 0,16 mm, p=0,01; temporal: 0,14 ± 0,11 mm para 0,25 ± 0,12 mm, p=0,001), e ICURVE diminuiu (nasal: 0,25 ± 0,04 mm vs. 0,11 ± 0,07 mm, p=0,02; temporal: 0,25 ± 0,07 mm vs. 0,14 ± 0,08 mm, p=0,007).
Conclusão: As alterações na câmara anterior induzidas pelo iridectomia periférica a laser puderam ser avaliadas quantitativamente e documentadas pelo DRI OCT Triton^®.

Keywords: Gonioscopia; Tomografia de coerência óptica; Segmento anterior do olho; Glaucoma de ângulo fechado; Iridectomia; Terapia a laser; Lasers

Abstract

PURPOSE: Standard automated perimetry has been the standard method for measuring visual field changes for several years. It can measure an individual’s ability to detect a light stimulus from a uniformly illuminated background. In the management of glaucoma, the primary objective of perimetry is the identification and quantification of visual field abnormalities. It also serves as a longitudinal evaluation for the detection of disease progression. The development of artificial intelligence-based models capable of interpreting tests could combine technological development with improved access to healthcare.
METHODS: In this observational, cross-sectional, descriptive study, we used an artificial intelligence-based model [Inception V3] to interpret gray-scale crops from standard automated perimetry that were performed in an ophthalmology clinic in the Brazilian Amazon rainforest between January 2018 and December 2022.
RESULTS: The study included 1,519 standard automated perimetry test results that were performed using Humphrey HFA-II-i-750 (Zeiss Meditech). The Subsequently, 70%, 10%, and 20% of the dataset were used for training, validation, and testing, respectively. The model achieved 80% (68.23%–88.9%) sensitivity and 94.64% (88.8%–98%) specificity for detecting altered perimetry results. Furthermore, the area under the receiver operating characteristic curve was 0.93.
CONCLUSIONS: The integration of artificial intelligence in the diagnosis, screening, and monitoring of pathologies represents a paradigm shift in ophthalmology, enabling significant improvements in safety, efficiency, availability, and accessibility of treatment.

Keywords: Glaucoma; Disease progression; Perimetry; Visual Fields; Visual field tests; Artificial intelligence; Neural networks, computers; Machine learning

Abstract

PURPOSE: To evaluate the economic impact of the following initial treatment scenarios for glaucoma on the Brazilian Public Health System (SUS): (1) traditional continuous instillation of hypotensive eye drops and (2) single session of selective laser trabeculoplasty.
METHODS: Economic impact was analyzed in three scenarios, from the least to the most conservative, for a hypothetical cohort of 5,000 individuals with open-angle glaucoma. Thereafter, projections were made on the basis of a glaucoma prevalence of 3% in the 2021 Brazilian population size.
RESULTS: All three scenarios demonstrated that selective laser trabeculoplasty exhibited a significantly lower economic impact than the eye drops on SUS over one and five years. Furthermore, the difference was more than United States Dollar 8 billion at five years when considering 3% of the Brazilian population aged >40 years in 2021.
CONCLUSION: As the initial treatment for primary open-angle glaucoma, selective laser trabeculoplasty exhibited a lower economic impact on SUS than latanoprost and timolol maleate eye drop instillation in all the studied scenarios over one and five-year periods.

Keywords: Glaucoma; Trabeculotomy; Laser therapy; Cost analysis; Health care cost Unified Health System; Brazil

Abstract

Repeat selective laser trabeculoplasty has emerged as a valuable option for managing intraocular pressure in patients with primary open-angle glaucoma or ocular hypertension. This review synthesizes current evidence of the efficacy, safety, and clinical applicability of repeat selective laser trabeculoplasty. Evidence from randomized controlled trials, systematic reviews, and observational studies indicate that repeat selective laser trabeculoplasty effectively sustains significant intraocular pressure reduction with minimal complications. This procedure demonstrates comparable efficacy to that of initial selective laser trabeculoplasty, supporting its role as a sustainable, drop-free management strategy. However, further research is warranted to optimize treatment intervals, assess long-term outcomes, and evaluate cost-effectiveness across different healthcare settings.

Keywords: Glaucoma; Ocular hypertension; Intraocular pressure; Selective laser trabeculoplasty

Abstract

Capsulotomy with neodymium-doped yttrium-aluminum-garnet (Nd:YAG) laser is an effective treatment for posterior capsule opacification following cataract surgery. A wide opening of the posterior capsule associated with the ruptured anterior hyaloid can cause anterior chamber vitreous prolapse. Two patients who developed angle-closure glaucoma associated with vitreous prolapse following Nd:YAG laser posterior capsulotomy were successfully treated with antiglaucoma medication and peripheral iridotomies. Patient identification for potential risk factors and a careful postoperative follow-up are essential to avoid these serious complications.

Keywords: Glaucoma; Glaucoma angle closure; Cataract; Posterior capsulotomy; Laser, solid-state

Abstract

Angle-closure glaucoma is a major cause of visual impairment worldwide, with Plateau iris syndrome presenting management challenges. We present a case report of a 58-year-old woman with advanced, uncontrolled angle-closure glaucoma and Plateau iris. Her history included laser peripheral iridotomy and three glaucoma medications in both eyes. Different treatments were implemented. For the eye with lower intraocular pressure, fewer peripheral anterior synechiae, and milder disease: phacoemulsification with intraocular lens implantation. For the eye with more advanced disease, a two-step approach was used: slow-coagulation transscleral cyclophotocoagulation using the double-arc protocol, followed by phacoemulsification with intraocular lens implantation 2 months later. Both eyes achieved improved visual acuity and intraocular pressure control with fewer medications, without significant complications. This case highlights transscleral cyclophotocoagulation followed by phacoemulsification as an alternative to combined surgeries in uncontrolled angle-closure glaucoma with Plateau iris, offering a simpler technique, more predictable refractive and pressure-control outcomes, and more straightforward postoperative management.

Keywords: Glaucoma, angle-closure/surgery; Iris diseases/surgery; Laser coagulation/methods; Phacoemulsification; Lens implantation, intraocular; Case reports