Biomaterial Database

Excimer laser photorefractive keratectomy to correct residual myopia after radial keratotomy. 1993

T W Hahn, and J H Kim, and Y C Lee

Department of Ophthalmology, Kangnam St Mary's Hospital, Catholic University Medical College, Seoul, Korea.

We performed excimer laser photorefractive keratectomy (PRK) on 10 undercorrected myopic eyes of nine patients with residual myopia, (N = 2, > -6.00 D, N = 8, -2.00 -5.75 D) after radial keratotomy. Patients' mean age was 32.1 years. The time interval between radial keratotomy and PRK ranged from 12 to 90 months (mean 35). All patients after PRK were followed 9 months or more. Nine months following PRK, uncorrected visual acuity ranged from 20/25 to 20/50 in all cases. Mean manifest refractive changed from -5.06 D preoperatively to -0.66 D after surgery, and the mean keratometric power changed from 41.40 +/- 1.56 D to 38.48 +/- 1.77 D. Persistent corneal haze (grade 1) was noted only in one eye at 9 months and no other significant complications occurred. Therefore, excimer laser PRK appears to be a good method to correct residual myopia after radial keratotomy.

UI	MeSH Term	Description	Entries
D007646	Keratotomy, Radial	A procedure to surgically correct REFRACTIVE ERRORS by cutting radial slits into the CORNEA to change its refractive properties.	Radial Keratotomy,Keratotomies, Radial,Radial Keratotomies
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009216	Myopia	A refractive error in which rays of light entering the EYE parallel to the optic axis are brought to a focus in front of the RETINA when accommodation (ACCOMMODATION, OCULAR) is relaxed. This results from an overly curved CORNEA or from the eyeball being too long from front to back. It is also called nearsightedness.	Nearsightedness,Myopias,Nearsightednesses
D012086	Reoperation	A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.	Revision, Joint,Revision, Surgical,Surgery, Repeat,Surgical Revision,Repeat Surgery,Revision Surgery,Joint Revision,Revision Surgeries,Surgery, Revision
D003315	Cornea	The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed)	Corneas
D005260	Female		Females
D005500	Follow-Up Studies	Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.	Followup Studies,Follow Up Studies,Follow-Up Study,Followup Study,Studies, Follow-Up,Studies, Followup,Study, Follow-Up,Study, Followup
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults