Diagnosis and treatment of lens diseases

The lens represents a unique tissue in light of its embryologic development, retention of old cells and nuclear make-up, transparent nature, immune privileged status, and metabolic restrictions. Disorders of malformation and malposition occur, but cataract development is the most common and significant problem for owners and animals. Technologic and pharmacologic advances have allowed surgical removal of equine cataracts to become an acceptable alternative, capable of returning a visually impaired horse to a functional status. Uveal inflammation represents the greatest threat to successful surgical cataract removal. Veterinarians should consult with those versed in ophthalmology for assistance in diagnosis, prognosis, peroperative treatment, surgical intervention, and follow-up on lens disorders.