Refraction and anterior chamber depth change after vitrectomy for pseudophakia
Kumagai, K.; Ogino, N.; Demizu, S.; Shinjo, U.; Shioya, M.; Ueda, K.; Fukuoka, Y.; Atsumi, K.; Hayashi, H.
Nippon Ganka Gakkai Zasshi 104(8): 567-571
2000
ISSN/ISBN: 0029-0203 PMID: 10979297 Document Number: 518712
To evaluate the association between the vitreous and the refractive error in pseudophakia. 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. 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. About 15% of postoperative refractive error may be associated with the vitreous, but further investigation is required.