Medical Terminology Simplified

Muscular eye disorder in which the eyes turn from the normal position so that they

deviate in different directions

Various forms of strabismus are referred to as tropias, their direction being indicated by

the appropriate prefix, such as esotropia and exotropia. (See Fig. 11–10.)

Strabismus in which there is deviation of the visual axis of one eye toward that of the

other eye, resulting in diplopia; also called cross-eye and convergent strabismus

Strabismus in which there is deviation of the visual axis of one eye away from that of

the other eye, resulting in diplopia; also called wall-eye and divergent strabismus

528 CHAPTER 11• Special Senses: Eyes and Ears

Figure 11-10Types of strabismus. (A)Esotropia. (B)Exotropia.

strabismus

stră-BĬZ-mŭs

esotropia

ĕs-ō-TRŌ-pē-ă

eso-: inward

-tropia: turning

exotropia

ĕks-ō-TRŌ-pē-ă

exo-: outside,

outward

-tropia: turning

Normal macula Macular degeneration

Normal vision

Central vision loss

Figure 11-9Macular degeneration.

A B