Study on ocular torsion of V patterns strabismus.
OBJECTIVE
To investigate the ocular torsion of V patterns.


METHODS
Twenty-two in hospital V patterns patients underwent bilateral inferior oblique muscles myectomy for inferior oblique overacting and hortizon recti underwent recess-resection procedure to correct hortizon devation. Objective cycloposition was assessed by fundus photograph before and 7 days after surgery in all cases. The photographs was stored in computer, and the disc-fovea angle was measured by means of drawing picture software. As well as the deviation, oblique muscle function was recorded before and after surgery.


RESULTS
Seventeen cases were bilateral ocular excyclotropia, 4 cases were monocular excyclotropia and one case was annual. The disc-fovea angle of right eyes and left eyes before operation is 15.67 degrees +/- 5.72 degrees and 16.59 degrees +/- 6.69 degrees. The comparisons among V patterns and normal average showed significant differences (P < 0.001). The disc-fovea angle of right eyes and left eyes after operation is 5.24 degrees +/- 5.87 degrees and 7.17 degrees +/- 5.40 degrees. There is no statistic difference between normal average (P > 0.5). The deviation between up- and down 25 degrees is 23.1 +/- 6.8 before surgery, as well as the one is 2.0 +/- 2.25 one week postoperatively. All cases have bilateral inferior oblique overaction, and diminished but one case still has unilateral moderate overaction 7 days after surgery.


CONCLUSIONS
There is objective cyclotropia in case of V patterns, and the objective torsion is normal after weakening overacted inferior oblique muscles.
Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China.
Xinping
X
Yu
Guanghuan
G
Mai
Huanyun
H
Yu
Daming
D
Deng
Xiaoming
X
Lin
Jingchang
J
Chen
Heping
H
Wu
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D005451:Fluorescein Angiography / Q000379:methods; D005584:Fovea Centralis / Q000473:pathology; D005654:Fundus Oculi; D006801:Humans; D008297:Male; D009801:Oculomotor Muscles / Q000503:physiopathology*; D013285:Strabismus / Q000473:pathology / Q000503:physiopathology*; D014102:Torsion Abnormality / Q000503:physiopathology