Page 1215 - Problem-Based Feline Medicine

59. The cat with ocular discharge or

changed conjunctival appearance

Richard IE Smith

KEY SIGNS
● Serous to mucopurulent ocular discharge.
● Chemosis, hyperema.
● Follicles.
● Diffuse or focal mass.

MECHANISM
Basic pathophysiological mechanisms of ocular discharge can include:
● Reflex lacrimation due to irritation of the corneal surface.
● Effects of infectious micro-organisms on conjunctival tissues.
● Allergic conditions causing increased tearing.
● Effects of inflammatory conditions of the orbit and adnexal tissues on conjunctival tissues.
● Reduced drainage of the tear film.
Ocular discharges can be serous, mucoid or mucopurulent.

WHERE?
A changed conjunctival appearance with ocular discharge may result from diseases of:
● Eyelid.
● Conjunctiva.
● Cornea.
● Orbit.
● Tear duct.

WHAT?
● Infectious causes of conjunctivitis such as Chlamydophila felis and feline herpesvirus-1 are the
most common cause of increased ocular discharge in cats.

1207