The answer is letter D.
Exophthalmometry,
keratometry, and gonioscopy are tests performed for the eyes. Exophthalmometry
is used for measuring the degree of the forward displacement of the eye to the
front of the cornea. Keratometry measures the corneal curvature or the power of
the cornea determining astigmatism (how eyes react to light). Gonioscopy is a
test that looks between the cornea and the iris to check where fluids of the
eye drain out. These are all practices in medicine that determine the functions
and abnormalities of the eyes and its different sections.
