The surgical reversal of presbyopia: a new procedure to restore accommodation.
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Accommodation, Ocular↗
Biomedical subjects
R H Marmer
Publications and source records attributed to R H Marmer.
Therapeutic and protective properties of the corneal collagen shield.
Following completion of radial keratotomy (RK) corneal incisions, 16 rabbits had a collagen shield placed on the operated cornea. Sixteen additional rabbits did not receive a collagen shield and were studied as a control group. The operated eyes of each group were enucleated at specified intervals. Fifty patients between 18 and 30 years of age with myopia greater than -6.5 diopters (D) had RK surgery: 25 patients (31 eyes) were chosen as a control group and 25 patients (30 eyes) had a collagen shield placed on the operated cornea at the end of surgery. Each patient was followed clinically at specified intervals. Histological and clinical findings included decreased postoperative corneal edema and inflammatory reaction and accelerated epithelial and stromal healing time and corneal stability. Patients who received collagen shields noted less glare and discomfort and obtained an average of nearly 1 D greater effect than the control group.
Animals↗
Radial keratotomy complications.
In a new surgical procedure, adverse reactions or complications may surface without most ophthalmic surgeons experiencing them or being aware of them. Even those with a large series of cases may never see certain problems. Through a collaborative effort with over 200 radial keratotomy surgeons totaling 63,000 cases nearly every significant complication has been documented. This study of radial keratotomy complications includes the number of patients and percentage of the total of the following: intraoperative occurrences which generally do not affect vision, which include microperforations and macroperforations; postoperative changes which do not affect vision: limbal "peeking" and star pattern with light; transient occurrences which tend to resolve with time: ptosis, recurrent erosions, corneal ulcer, microwound abscess, delayed wound healing, inferior rectus palsy, glare or fluctuating vision after six months, iritis, and stromal keratitis; postoperative changes which can affect vision (correctible): overcorrection more than 1.5 diopters, marked undercorrection more than -2.00 diopters, irregular astigmatism, neovascularization after soft-contact-lens wear, and best-corrected acuity decreased usually only one line; and postoperative changes which can affect vision (uncorrectible): retrobulbar hemorrhage and endophthalmitis, loss of the eye, herpes keratitis, and cataract formation.
Follow-Up Studies↗
Ocular deviation induced by radial keratotomy.
We present a case of ocular deviation recurring after radial keratotomy on one eye. Fusion returned after surgery on the fellow eye. Radial keratotomy may be contraindicated in some patients with large muscle imbalances.
Adult↗