Use of biometry and keratometry for determining optimal power for intraocular lens implants in dogs.
Axial length and corneal curvature were determined by use of A-scan ultrasonography and keratometry on both eyes of dogs of various breeds, sizes, and ages. Mean axial length was 20.43 +/- 1.48 mm; axial length was not related to age or sex, but was significantly greater (P = 0.047) in dogs of larger breeds. Mean corneal curvature was 39.94 +/- 2.61 diopters. Dogs of large breeds had significantly (P less than 0.001) flatter corneas. Mild, roughly symmetric astigmatism was detected in a majority of dogs. Use of mean values in a theoretic artificial intraocular lens power equation suggests that aphakic dogs require an implant of approximately 40 diopters to achieve emmetropia.
Gaiddon
J
J
Clinique Veterinare des Tignes, Cannes, France.
Rosolen
S G
SG
Steru
L
L
Cook
C S
CS
Peiffer
R
R
D000818:Animals; D001035:Aphakia / Q000601:surgery / Q000662:veterinary*; D001699:Biometry; D003315:Cornea / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D004283:Dog Diseases / Q000601:surgery*; D004285:Dogs; D005260:Female; D007910:Lenses, Intraocular / Q000662:veterinary*; D008297:Male; D014463:Ultrasonography