Table 1 Preoperative characteristics in 293 eyes that undergo PRK Surgery
From: Studying the factors related to refractive error regression after PRK surgery
Factor | Frequency | Percent |
|---|---|---|
Female | 180 | 61.4 |
Men | 113 | 38.6 |
Education degree | ||
Under diploma | 47 | 16 |
Diploma | 91 | 31.1 |
Bachelor | 115 | 39.2 |
Post graduate | 40 | 13.7 |
Optical zone | ||
5.5 (mm) | 7 | 2.1 |
6.00 (mm) | 20 | 6.8 |
6.50 (mm) | 267 | 91.1 |
Refraction type | ||
Myopia (D) | 16 | 5.5 |
Hyperopia (D) | 3 | 1 |
Astigmatism (D) | 14 | 4.8 |
Myopic astigmatism (D) | 223 | 76.1 |
Hyperopic astigmatism (D) | 37 | 12.6 |
Surgeon specialty | ||
Ophthalmologist | 135 | 46.1 |
Deviation specialty | 51 | 17.4 |
Retina specialty | 34 | 11.6 |
Cornea specialty | 73 | 24.9 |
Astigmatism category (D) | ||
Astigmatism category (0–2) D | 243 | 82.9 |
Astigmatism category (2–4) D | 47 | 16 |
Astigmatism category (4–6) D | 3 | 1 |
Sphere category (D) | ||
Sphere category (0–2) D | 93 | 31.7 |
Sphere category (2–4) D | 110 | 37.5 |
Sphere category (4–6) D | 50 | 17.1 |
Sphere category (6–8) D | 22 | 7.5 |
Sphere category (8<) D | 18 | 6.1 |
Total | 293 | 100 |