Test of clearness or sharpness of vision

nearsightedness, parallel rays entering the eye are focused in front of the retina

farsightedness, or inability of the eyes to focus on nearby objects; rays of light entering the eye are brought to focus behind the retina

uneven focusing of the image, resulting from distortion of the curvature of the lens or cornea.

measuring of intraocular pressure using a tonometer

determines the physical space visible to an individual in a fixed position

examines the various layers of the eye with a bright light

agent that dilates the pupil

hyperopia and impairment of vision due to advancing in years or old age

ability of the eye to adjust to variations in distance

procedure that uses a bright green fluorescent dye to examine movement of blood through blood vessels in the eye

reduced vision in one eye, not correctable by wearing glasses but by wearing an eye patch, also called strabismus

inflammation of the eyelid

abnormal progressive condition of the lens, characterized by loss of transparency

the inability to see any color at all

profound inability to see color

a weakness in perceiving colors distinctly

inflammation of the conjunctiva also called red eyes or pink eye

an abnormal condition of increased pressure within the eye. Prolonged pressure can damage the retina and optic nerve

sty or stye, resulting from an infected sebaceous gland of an eyelash

progressive deterioration of the retina associated with new vessel formation that can progress to blindness

poor vision at night or in dim light

excessive sensitivity of the eyes to light

drooping of the upper eyelids

separation of the retina from the choroid, usually resulting from a hole or tear in the retina

any disease of the retina