Graddy reports six cases, and many others are constantly occurring.
Other forms of retinal injury from too great or too prolonged exposure to light are "moon-blindness," due to sleeping with the eyes exposed to bright moonlight, and that due to lightning--a case, e.g., being reported by Knies.

Silex also reports such a case and reviews the reported cases, 25 in number, in ten of which cataract ensued.

In the Annual of the Universal Medical Sciences, 1888, there is a report of seven cases of retinal injury with central scotoma, amblyopia, etc., in Japanese medical students, caused by observation of the sun in eclipse.
In discussing the question of electric-light injuries of the eyes Gould reviews the literature of the subject and epitomizes the cases reported up to that time.

They numbered 23.

No patient was seriously or permanently injured, and none was in a person who used the electric light in a proper manner as an illuminant.