STEREOPSIS AND OPTICAL COHERENCE TOMOGRAPHY FINDINGS AFTER EPIRETINAL MEMBRANE SURGERY.
OBJECTIVE
To evaluate stereopsis in patients undergoing vitrectomy for epiretinal membrane and to investigate the relationship between stereopsis and foveal microstructures.


METHODS
This study included 55 eyes of 55 patients who underwent vitrectomy for unilateral epiretinal membrane and 27 age-matched normal subjects. We examined stereopsis using the Titmus Stereo Test, TNO stereotest, and, optical coherence tomography before surgery and 6 months after surgery. Central foveal thickness, central retinal thickness at the parafovea (CRT-3 mm), macular volume, and retinal layer thickness were measured with the optical coherence tomography software and an image-processing program.


RESULTS
Epiretinal membrane surgery significantly improved stereopsis in Titmus Stereo Test and in TNO. Stereopsis after surgery was significantly worse than in normal subjects. In stepwise multiple regression analysis, preoperative stereopsis showed a significant association with preoperative CRT-3 mm. Postoperative stereopsis was significantly correlated with postoperative inner nuclear layer thickness. Postoperative Titmus Stereo Test and TNO were significantly related to preoperative CRT-3 mm and preoperative macular volume and inner nuclear layer thickness, respectively.


CONCLUSIONS
Vitrectomy for epiretinal membrane improved stereopsis, albeit not to a normal level. Titmus Stereo Test, a stereotest with a smaller index, was related to CRT-3 mm, whereas TNO with a larger index was correlated with retinal volume of the entire posterior pole and mean inner nuclear layer thickness.
Department of Ophthalmology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan.
Fumiki
F
Okamoto
Yoshimi
Y
Sugiura
Yoshifumi
Y
Okamoto
Takahiro
T
Hiraoka
Tetsuro
T
Oshika
D000368:Aged; D003867:Depth Perception / Q000502:physiology*; D019773:Epiretinal Membrane / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D041623:Tomography, Optical Coherence; D014792:Visual Acuity / Q000502:physiology; D014821:Vitrectomy