DR. ANKITA GOGOI

DR.PRASENJIT KALITA, Dr.Jyoti Bhuyan, DR. MANJIT BORO

Abstract

Pupil cycle time (PCT) is a fast,simple & reliable clinical test of optic nerve function.It measures persistent regular oscillations of the pupil,induced by a slit lamp & is a sensitive measure of dysfunction of parasympathetic efferent limb of pupillary light reflex arc.The aim of this study is to evaluate PCT value in patients with diabetic retinopathy & its role in detecting Diabetic Autonomic neuropathy

Methodology:observational,cross sectional study.50 known Type 2 diabetic patients with different grades of retinopathy with no other significant ocular & neurological comorbidity were selected.All underwent complete ophthalmologic examination and PCT measurement

Results–mean PCT in diabetics is prolonged & is found to be increasing with increasing severity of diabetic retinopathy and duration of diabetes

Conclusion-Prolonged PCT correlates with severity of Diabetic retinopathy & is a useful tool to detect & assess amount of autonomic neuropathy affecting pupils of a diabetic patient

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