Direct ophthalmoscope, line-powered

Definition

A mains electricity (AC-powered), hand-held, ophthalmic instrument designed to examine the interior of the eye allowing the examiner to clearly see the details of the retina and other structures/media (cornea, aqueous, lens, and vitreous). It consists of, a built-in light that is directed by the examiner through the pupil to illuminate the interior of the eyeball, a mirror with a single hole through which the examiner will view, and a dial containing several lenses of different powers that can be alternated by the examiner whilst viewing. It produces an upright, or unreversed, image of approximately 15 times magnification. The power is run through a transformer to reduce this to low-voltage.

GUDID devices

103

Last updated

2020-10-14 06:29:59