[Study of diopters-cutting in treatment of PRK for myopia].
OBJECTIVE
To study a method of determining the diopters-cutting for photorefractive keratectomy (PRK) pre-operation.


METHODS
By statistics, to analyze the differences of diopter between optometry of mydriasis and keratectomy in 143 cases 209 eyes of medium myopia with complete data recorded.


RESULTS
The average diopter for optometry of mydriasis is -4.32 D, for keratectomy, -4.74 D. The average of differences is (0.42 +/- 0.173) D, P < 0.01.


CONCLUSIONS
The numerical value of diopter-cutting for operation should be higher than for optometry of mydriasis in treatment of PRK for myopia.
Huang
Zicai
Z
Department of Ophthalmology, Shantou Central Hospital, Guangdong 515031, China.
Zhou
Zhongxia
Z
Chen
Suyan
S
Li
Hongni
H
Chen
Hua
H
Liu
Shuwen
S
D000293:Adolescent; D000328:Adult; D003315:Cornea / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D009184:Mydriatics; D009216:Myopia / Q000601:surgery*; D018903:Photorefractive Keratectomy / Q000379:methods; D011680:Pupil / Q000187:drug effects; D012029:Refraction, Ocular
D009184:Mydriatics