Abstract: 【Abstract】 Objective To observe the recovery of near stereo vision after wearing Ortho-K (OK) contact lens for unilateral myopia. Design Retrospective case series. Participants Twenty three cases of unilateral myopia corrected by Ortho-K contact lens during October 2009 and December 2011 in Suzhou Eye Hospital were collected. The average age of participants was 12.28±2.41 years. The refractive error varied from -1.25 D to -4.875 D, on average -2.71±1.09 D. Methods The visual acuity, near stereo vision（Titmus） were checked pre-wearing Ortho-K contact lens, and 1 week, 1 month, 3 months post-wearing respectively. Main Outcome Measures Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refraction and near stereo vision with glasses. Results The mean UCVA was 4.26±0.23, and BCVA was 5.02±0.07 pre-wearing OK contact lens. The UCVA was 4.97±0.07, 5.03±0.08, 5.05±0.06 at post- wearing OK lens 1 week, 1 month, 3 months respectively. The UCVA at post-correction 1 week was significantly lower than pre-correction BCVA (P=0.015). But at post- correction 1 month and 3 months, the UCVA was no significantly difference with pre- correction BCVA (P=0.257 and 0.090 respectively). The higher the unilateral myopia was, the poorer the stereo vision was (r2=0.726, P=0.000). Before correction, 9 cases (39%) had macular fovea stereo vision. Abnormal stereo vision existed in 14 cases (61%), including 8 cases with macula stereo vision, 4 cases with peripheral stereo vision, and 2 cases with stereo vision blind. Compared with pre-correction, macular fovea stereo vision was found in 10 cases (43%), 13 cases (57%) and 17 cases (74%) post-correction 1 week (P=0.50), 1 month (P=0.19) and 3 months (P=0.018) respectively. Conclusion The study indicates that the severer unilateral myopia is, the poorer stereo vision is. Most unilateral myopia patients can get perfect stereo vision after wearing Ortho-K contact lens 3 months. (Ophthalmol CHN, 2012, 21: 384-386)

Key words: myopia, ansometropia, orthokeratology, binocular vision; , stereo vision