and Nyctalopia as different clinical entities. Under ' Hemeraiopia ' (night blindness) he says ' The patients state that they see normally well during the day but during the evening must be led along in less well illuminated streets, etc.'. Under ' Nyctalopia' he _ says ' The symptom opposed to that of hemeraiopia is nyctalopia, i.e. that condition in which during the evening (in reduced illumi...

Sir,?Though it is a rare disease in Europe, nyctalopia is not so uncommon in the tropics. There are two varieties of night-blindness?one symptomatic and the other idiopathic. The etiology of the disease is very obscure, and much more varied and uncertain is its treatment too. Dr. Tweedy says that " the prognosis of the symptomatic night-blindness is generally unfavourable ; while that of the id...

This is a case report of a patient with unilateral nyctalopia in whom ipsilateral optic disc drusen were the only finding despite extensive investigation.

INTRODUCTION Ophthalmologists are occasionally confronted with an individual presenting with nyctalopia (i.e., a relatively greater difficulty seeing at night). When there is no accompanying abnormality seen in the fundus, visual electrophysiology becomes useful as an objective means of assessing rod (scotopic) photoreceptor function or pathway defects. MATERIALS AND METHODS A retrospective s...

This case report describes the clinical, autofluorescence, and optical coherent tomography findings in a patient with panocular argyrosis secondary to chronic intake of diluted silver nitrate salts in his water supply. An 86-year-old Caucasian male with a distinctive gray-bluish hue of the skin presented to our clinic, having developed a slow decrease in visual acuity in both eyes and nyctalopi...