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Assessment of Non-Invasive Tear Break-Up Time and Tear Meniscus Height After Instillation of Three Different Formulations of Anesthetic Eye Drops by Oculus Keratograph 5M Publisher



Nezam MS1 ; Safavi M2 ; Azizzadeh P3 ; Akbarshahi P4
Authors

Source: Revista Brasileira de Oftalmologia Published:2018


Abstract

Purpose: To assess the non-invasive tear break-up time (NITBUT) and tear meniscus height (TMH) after instilling the three different types of anesthetic eye drops by Oculus Keratograph 5M. Methods: In this prospective study, 85 healthy subjects (85 eyes) were randomly divided into three groups. The groups were randomly received lidocaine hydrochloride 2%, proparacaine hydrochloride 0.5%, and tetracaine hydrochloride 0.5%. The qualitative and quantitative parameters of tear film were assessed using NITBUT and TMH, respectively. In all groups, the quantity of tear film using TMH was measured in the right eye of subjects, while the quality of tear film using NITBUT was assessed in the left eye. The analysis of variance (ANOVA) was used to compare the difference between before and after the intervention. A P-value < 0.05 was considered significant. Results: Differences for TMH and NITBUT between before and after applying lidocaine hydrochloride 2% were not statistically significant (P > 0.05). The mean values of NITBUT and TMH after the instillation of proparacaine hydrochloride 0.5% showed a significant decrease than before the intervention (P < 0.05). Also, after the use of tetracaine hydrochloride 0.5%, the mean value of NITBUT was significantly increased (P < 0.05), but the mean value of TMH was significantly decreased than before the intervention (P < 0.05). Conclusion: Our study showed that lidocaine hydrochloride 2% as an anesthetic eye drops can be an appropriate choice for eye examinations due to a lack of significant effect on the quantity and quality of tear film. © 2018, Sociedade Brasileira de Oftalmologia.; Objetivo: Avaliar o tempo de ruptura lacrimal nao invasivo (NITBUT) e a altura do menisco lacrimal (TMH) apos instilar os tres tipos diferentes de colirio anestesico pelo Oculus Keratograph 5M. Metodos: Neste estudo prospectivo, 85 individuos saudaveis (85 olhos) foram divididos aleatoriamente em tres grupos. Os grupos receberam aleatoriamente cloridrato de lidocaina a 2%, cloridrato de proparacaina a 0.5% e cloridrato de tetracaina a 0.5%. Os parametros qualitativos e quantitativos do filme lacrimal foram avaliados utilizando NITBUT e TMH, respectivamente. Em todos os grupos, a quantidade de filme lacrimal utilizando TMH foi medida no olho direito dos sujeitos, enquanto a qualidade do filme lacrimal usando NITBUT foi avaliada no olho esquerdo. A analise de variancia (ANOVA) foi utilizada para comparar a diferenca entre antes e depois da intervencao. Um valor de P < 0.05 foi considerado significativo. Resultados: Diferencas para TMH e NITBUT entre antes e depois da aplicacao de cloridrato de lidocaina a 2% nao foram estatisticamente significantes (P > 0.05). Os valores medios de NITBUT e TMH apos a instilacao de cloridrato de proparacaina a 0.5% mostraram uma diminuicaosignificativa do que antes da intervencao (P < 0.05). Alem disso, apos o uso de cloridrato de tetracaina a 0.5%, o valor medio de NITBUT foi significativamente aumentado (P < 0.05), mas o valor medio de TMH foi significativamente menor do que antes da intervencao (P < 0.05). Conclusao: Nosso estudo mostrou que o cloridrato de lidocaina a 2% como colirio anestesico pode ser uma escolha apropriadapara exames oftalmologicos devido a falta de efeito significativo sobre a quantidade e a qualidade do filme lacrimal. © 2018, Sociedade Brasileira de Oftalmologia.
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