Dry Eye Syndromes Clinical Trial
Official title:
The Effect of Combination of Vitamin A, Vitamin E, Sodium Hyaluronate 0.15% Eye Drop Compared With Sodium Hyaluronate 0.1% Eye Drop to Tear Film Stability and Conjunctival Goblet Cells Density in Patient With Non-Proliferative Diabetic Retinopathy (NPDR), and Proliferative Diabetic Retinopathy (PDR)
Commonly know that one of the complications caused by Diabetes Mellitus (DM) is microangiopathy. Microangiopathy in the long term may lead to neuropathy of the corneal nerves. Neuropathy of the cornea will lead to dry eyes in DM patient. One of the artificial tears used in treating dry eyes is sodium hyaluronate. But until recently no research had been done in examining the effect of giving combination of sodium hyaluronate, vitamin A and vitamin E in dry eyes. The antioxidant, and capability of vitamin A and E in promoting cell proliferation may alleviate the symptoms of dry eyes. In this paper we used Ocular Surface Disease Index (OSDI), Tear Break Up time, Schirmer I test and impression cytology to assess baseline and 28 days post therapy in patient with Non-Proliferative Diabetic Retinopathy (NPDR), and Proliferative Diabetic Retinopathy (PDR)
The study is double blind randomized clinical trial, comparing the usage of combination of sodium hyaluronate 0.15%, vitamin A and vitamin E eye drops compared to sodium hyaluronate 0.1% eye drop only in patient with NPDR or PDR with decreased corneal sensitivity. The examination consisted of OSDI questionnaire, tear film break up time, Schirmer I, and goblet cell density, examined at baseline and 4 weeks (day 28) after the initial eye drops is given. For sample size calculation, estimated 96 patients are required to give statistical effect, this number already calculating the possibility of 20% drop out rate. Every eligible patient is then randomized with block randomization into each allocated arm. Statistical analysis used for this study is unpaired T test if the data distribution is normal, if not Mann-Whitney test will be used. ;
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