Vector analysis of corneal astigmatism after scleral buckling surgery.
We conducted a short-term prospective study of 125 eyes with retinal detachment to examine changes of corneal astigmatism about 2 weeks after scleral buckling surgery, using a vector method on 2-fold-angle rectangular coordinates. Segmental buckles of one to less than two quadrants produced significantly greater changes in astigmatism (1.65 +/- 0.97 dptr) than those of less than one quadrant (0.88 +/- 0.75 dptr) and those spanning two quadrants or more (1.09 +/- 0.38 dptr) (p = 0.0005, Kruskal-wallis test; n = 73). The amplitude of differential vectors after explant buckling surgery (1.33 +/- 0.89 dptr, n = 24) was significantly greater than after implant buckling surgery (0.65 +/- 0.45 dptr, n = 15) (p = 0.009, Mann-Whitney U-test) with buckles of one quadrant or less. Differential vectors tended to direct toward the buckles. There was no obvious directional tendency in the case of encircling procedures (n = 52).
Kinoshita
M
M
Department of Ophthalmology, Faculty of Medicine, Kyoto University, Japan.
Tanihara
H
H
Negi
A
A
Kawano
S I
SI
Ishigouoka
H
H
Ueda
Y
Y
Suzuki-Yoshida
S
S
Honda
Y
Y
D000293:Adolescent; D000328:Adult; D000368:Aged; D001251:Astigmatism / Q000209:etiology* / Q000503:physiopathology; D002387:Cataract Extraction / Q000009:adverse effects; D003315:Cornea / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D011446:Prospective Studies; D012163:Retinal Detachment / Q000601:surgery*; D012591:Scleral Buckling / Q000009:adverse effects*