Feline lens disorders.

The lens is the second most powerful structure for refraction in the eye, and is important in the fine-focusing ability in individual species. Specific disorders of the feline lens are frequent in clinical practice and include: congenital anomalies, nuclear sclerosis, cataracts, lens subluxations and luxations, intraocular sarcomas, and anterior lens displacement associated with aqueous misdirection glaucoma. Clinical signs and current therapeutic options are discussed for the general practitioner. A close working relationship with the regional veterinary ophthalmologist is advised.