[Radial keratotomy, corneal hydration and intraocular pressure. Experimental study].
Radial keratotomy reduces myopia by flattening the central cornea. The role of wound hydration, length and depth of incisions, intraocular pressure and general weakening of the cornea play a part in this process. The relative importance of these factors is not clear. We examined the effect of wound hydration on an 8 incision radial keratotomy (RK) procedure performed on cadaver eyes. The cornea was moistened with balanced salt solution. A mean change of 10 D was achieved after 30 minutes. The corneal dehydration induced by Dextran B was associated with a significant reduction (10 D) in RK induced corneal flattening. It would appear that the radial incision induced keratometric change is a preliminary result of wound hydration. Intraocular pressure within the physiological range had very minimal influence (< 1.5 D) on corneal flattening.
Simon
G
G
Département d'Ophtalmologie, Bascom Palmer Eye Institute, University of Miami School of Medecine, FL.
Legeais
J M
JM
Parel
J M
JM
D001834:Body Water / Q000378:metabolism*; D002102:Cadaver; D003315:Cornea / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D007429:Intraocular Pressure; D007646:Keratotomy, Radial / Q000009:adverse effects; D011184:Postoperative Period
Kératotomie radiaire, hydratation cornéenne et pression intraoculaire. Etude expérimentale.