Evaluation of the ocular surface following bariatric surgery.

PURPOSE:: To identify and evaluate changes in the ocular surface in obese patients with bariatric surgery. METHODS:: The study included 89 randomly selected patients; 81 (91.0%) were women, 35 were preoperative, 32 were included 0-12 months after surgery, and 22 were included >12 months after surgery. All patients completed a dry eye-specific questionnaire and were evaluated by the tear ferning test, tear-film breakup time (BUT), Schirmer's test I, examination of the ocular surface by 1% rose Bengal staining, and impression cytology. Patients were questioned about compliance with nutritional supplementation. RESULTS:: The pre- and postoperative groups did not differ significantly in age (p=0.082), but did differ in body mass index (p<0.001). All test values are within the normal range and there was no statistically significant difference in ocular surface disease index score between the preoperative and postoperative periods. The mean tear-film BUT was lower than that considered normal (10 s) at each time it was tested. No statistically significant group differences were observed in Schirmer's test, BUT, rose Bengal staining, or impression cytology. A high rate of noncompliance with nutritional supplementation was observed. CONCLUSIONS:: No symptoms of xerophthalmia developed in this series of bariatric surgery patients. No changes were observed in any of the specific tests used to evaluate the ocular surface up to 5 years after surgery compared with presurgery results.

Evaluation of the ocular surface following bariatric surgery / Avaliação da superfície ocular após cirurgia bariátrica

ABSTRACT Purpose: To identify and evaluate changes in the ocular surface in obese patients with bariatric surgery. Methods: The study included 89 randomly selected patients; 81 (91.0%) were women, 35 were preoperative, 32 were included 0-12 months after surgery, and 22 were included >12 months after surgery. All patients completed a dry eye-specific questionnaire and were evaluated by the tear ferning test, tear-film breakup time (BUT), Schirmer's test I, examination of the ocular surface by 1% rose Bengal staining, and impression cytology. Patients were questioned about compliance with nutritional supplementation. Results: The pre- and postoperative groups did not differ significantly in age (p=0.082), but did differ in body mass index (p<0.001). All test values are within the normal range and there was no statistically significant difference in ocular surface disease index score between the preoperative and postoperative periods. The mean tear-film BUT was lower than that considered normal (10 s) at each time it was tested. No statistically significant group differences were observed in Schirmer's test, BUT, rose Bengal staining, or impression cytology. A high rate of noncompliance with nutritional supplementation was observed. Conclusions: No symptoms of xerophthalmia developed in this series of bariatric surgery patients. No changes were observed in any of the specific tests used to evaluate the ocular surface up to 5 years after surgery compared with presurgery results.

RESUMO Objetivos: Analisar os resultados dos testes de avialiação da superfície ocular em pacientes com obesidade submetidos à cirurgia bariátrica e identificar a presença e intensidades das alterações oculares após cirurgia bariátrica. Métodos: O estudo foi composto de 89 pacientes, amostra randômica, sendo 81 mulheres (91,0%). Os pacientes foram agrupados com relação à relação da cirurgia bariátrica: pré-operatório (35 pacientes), pós-operatório 0 a 12 meses (32 pacientes) e mais de 12 meses (22 pacientes). Todos os pacientes foram submetidos a seguinte sequencia de exames: questionário olho seco específico, teste de cristalização do filme lacrimal, teste da tempo de ruptura do filme lacrimal, Schirmer teste I, avaliação da superfície ocular usando rosa bengala, citologia de impressão. Os pacientes foram questionados quanto ao uso da suplementação nutricional. Resultados: Não houve diferença estatística entre os grupos quanto à idade (p=0,082). BMI foi significativamente diferente entre os grupos (p<0,001). Quanto ao OSDI, os valores foram normais, sem diferença estatística entre os períodos pré-operatório e pós-operatório. A média do tempo de ruptura do filme lacrimal foi abaixo do considerado normal (10 segundos) em todos os momentos avaliados. Não houve di ferença estatisticamente significante entre os grupos com relação aos exames: teste de Schirmer, BUT, biomicroscopia com rosa bengala 1% e citologia de impressão. Elevada taxa de uso incorreto da suplementação nutricional foi encontrada (73%). Conclusão: Não houve surgimento de sintomas de xeroftalmia nos pacientes submetidos à cirurgia bariátrica e não foram encontrados alterações em nenhum teste utilizado para avaliar a superfície ocular em cinco anos após a cirurgia em comparação com os pacientes antes da cirurgia.

Impression cytology and in vivo confocal microscopy in corneas with total limbal stem cell deficiency.

PURPOSES: To describe corneal changes seen on in vivo confocal microscopy in patients with total limbal stem cell deficiency and to correlate them with cytological findings. METHODS: A prospective case series including 13 eyes (8 patients) with total limbal deficiency was carried out. Stem cell deficiency was diagnosed clinically and by corneal impression cytology. Confocal images of the central cornea were taken with the Heidelberg Retina Tomograph II, Rostock Corneal Module (Heidelberg Engineering, Heidelberg, Germany). RESULTS: Impression cytology of the cornea revealed conjunctival epithelial cells and goblet cells in all cases. In vivo confocal microscopy showed disruption of normal layers of the corneal epithelium in all eyes. Confocal images showed cells with characteristics of conjunctival epithelium at the cornea in 76.9% of the total. These findings on confocal microscopy were compatible to limbal stem cell deficiency. Additionally, goblet cells, squamous metaplasia, inflammatory cells and dendritic cells were observed. The sub-basal nerve plexus was not identified in any of the corneas. Corneal neovessels were observed at the epithelium and stroma. All cases showed diffuse hyper-reflective images of the stroma corresponding to opacity of the tissue. CONCLUSIONS: Limbal stem cell deficiency had been confirmed by impression cytology in all cases, and 76.9% of the cases could also be diagnosed by in vivo confocal microscopy through the conjunctival epithelial cell visualization on the corneal surface. Frequent confocal microscopy findings were abnormal cells at the cornea (conjunctival epithelial, goblet and inflammatory cells), corneal neovessels and diffuse hyper-reflection of the stroma.

Impression cytology and in vivo confocal microscopy in corneas with total limbal stem cell deficiency / Citologia de impressão e microscopia confocal in vivo em córneas com deficiência total das células-tronco do limbo

PURPOSES: To describe corneal changes seen on in vivo confocal microscopy in patients with total limbal stem cell deficiency and to correlate them with cytological findings. METHODS: A prospective case series including 13 eyes (8 patients) with total limbal deficiency was carried out. Stem cell deficiency was diagnosed clinically and by corneal impression cytology. Confocal images of the central cornea were taken with the Heidelberg Retina Tomograph II, Rostock Corneal Module (Heidelberg Engineering, Heidelberg, Germany). RESULTS: Impression cytology of the cornea revealed conjunctival epithelial cells and goblet cells in all cases. In vivo confocal microscopy showed disruption of normal layers of the corneal epithelium in all eyes. Confocal images showed cells with characteristics of conjunctival epithelium at the cornea in 76.9% of the total. These findings on confocal microscopy were compatible to limbal stem cell deficiency. Additionally, goblet cells, squamous metaplasia, inflammatory cells and dendritic cells were observed. The sub-basal nerve plexus was not identified in any of the corneas. Corneal neovessels were observed at the epithelium and stroma. All cases showed diffuse hyper-reflective images of the stroma corresponding to opacity of the tissue. CONCLUSIONS: Limbal stem cell deficiency had been confirmed by impression cytology in all cases, and 76.9% of the cases could also be diagnosed by in vivo confocal microscopy through the conjunctival epithelial cell visualization on the corneal surface. Frequent confocal microscopy findings were abnormal cells at the cornea (conjunctival epithelial, goblet and inflammatory cells), corneal neovessels and diffuse hyper-reflection of the stroma.

OBJETIVOS: Descrever as alterações corneais observadas na microscopia confocal in vivo e relacioná-las aos achados da citologia de impressão em pacientes com deficiência total das células-tronco do limbo. MÉTODOS: Série de casos prospectiva incluindo 13 olhos (8 pacientes) com deficiência total das células-tronco do limbo. A deficiência límbica foi diagnosticada clinicamente e mediante citologia de impressão da córnea. Imagens confocais da córnea central foram obtidas com o Heidelberg Retina Tomograph II, Rostock Corneal Module (Heidelberg Engineering, Heidelberg, Alemanha). RESULTADOS: A citologia de impressão da córnea demonstrou células epiteliais da conjuntiva e células caliciformes em todos os casos. A microscopia confocal da área central da córnea mostrou alteração da estrutura normal das camadas do epitélio corneal em todos os casos. As imagens confocais da córnea mostraram a presença de células com características do epitélio conjuntival em 76,9%. Esses achados no exame confocal são compatíveis com deficiência das células-tronco do limbo. Adicionalmente, células caliciformes, metaplasia escamosa, células inflamatórias e dendríticas foram observadas. O plexo nervoso sub-basal não foi identificado em nenhum dos casos. Neovasos corneais foram observados no epitélio e no estroma. Em todos os casos havia imagens difusamente hiperreflectivas no estroma, correspondendo à opacidade do tecido. CONCLUSÕES: A deficiência das células-tronco do limbo, previamente confirmada por citologia de impressão, pôde ser demonstrada pela microscopia confocal in vivo em 76,9% dos casos através da visualização de células epiteliais da conjuntiva na córnea. Achados frequentes na microscopia confocal foram células anormais na córnea (células conjuntivais, caliciformes e inflamatórias), neovasos corneais e hiperreflexão difusa do estroma.