eye disorders
Tests for Eye Disorders
Ultrasonography
The eye can be examined by ultrasonography. A probe is placed gently against the closed eyelid and painlessly bounces sound waves off the eyeball. The reflected sound waves produce a two-dimensional image of the inside of the eye. Ultrasonography is useful when an ophthalmoscope or slit lamp cannot view the retina because the inside of the eye is cloudy or something is blocking the line of sight. Ultrasonography can be used to determine the nature of abnormal structures, such as a tumor or Detachment of the Retina . Ultrasonography can also be used to examine blood vessels supplying the eye (Doppler ultrasonography) and to determine the thickness of the cornea (pachymetry). 