1. [Refraction and anterior chamber depth change after vitrectomy for pseudophakia].
- Author
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Kumagai K, Ogino N, Demizu S, Shinjo U, Shioya M, Ueda K, Fukuoka Y, Atsumi K, and Hayashi H
- Subjects
- Aged, Aged, 80 and over, Anterior Chamber physiology, Female, Humans, Male, Middle Aged, Pseudophakia surgery, Refractive Errors etiology, Pseudophakia physiopathology, Refraction, Ocular physiology, Vitrectomy, Vitreous Body physiology
- Abstract
Purpose: To evaluate the association between the vitreous and the refractive error in pseudophakia., Methods: Vitrectomy was performed in 67 eyes of 61 patients who underwent cataract surgery. Vitrectomy was needed for epiretinal membrane in 30 eyes, macular edema in 22 eyes, macular hole in 3 eyes, lamelar macular hole in 2 eyes, vitreous opacity in 6 eyes, and vitreous hemorrhage in 4 eyes. Refraction was measured before the operation, and 1 month, 3 months, 6 months, and 12 months after operation. Anterior chamber depth was measured in 10 eyes before the operation, and 1 month, 3 months, and 6 months after operation. We evaluated the refractive error after vitrectomy in 49 eyes that had predicted refraction., Results: The mean value of refractive change was -0.3 D 1 month postoperatively, and then gradually became positive. The variation of refraction (6-month postoperative refraction minus preoperative refraction) was negatively correlated with preoperative refraction (p = 0.0052, R2 = 0.146). If preoperative refraction was more myopic than -1.5 D, then refraction became positive. If preoperative refraction was not more myopic than -1.5 D, then refraction became negative., Conclusion: About 15% of postoperative refractive error may be associated with the vitreous, but further investigation is required.
- Published
- 2000