INTRAOCULAR LENS POWER CHANGE AFTER TRABECULECTOMY

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PAKRAVAN M.; ALVANI A.; JAFARZADEHPOOR E.; TABATABAEI S.M.; YAZDANI S.; YASERI M.

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Journal: BINA Year:2015 | Volume:20 | Issue:2 Page(s): 131-138

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Title

INTRAOCULAR LENS POWER CHANGE AFTER TRABECULECTOMY

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Keywords

INTRAOCULAR LENSQ3

INTRAOCULAR LENS POWER CALCULATION FORMULASQ3

POWER TRABECULECTOMYQ3

Abstract

Purpose: To describe the biometric changes and their effect on INTRAOCULAR LENS (IOL) power calculation after trabeculectomy and to compare the accuracy of four formulas namely SRK/II, SRK/T, Holladay and Hoffer Q for IOL power calculation in these patients.Methods: Thirty-four eyes of 31 glaucoma patients who were scheduled for primary trabeculectomy were enrolled. A non-contact biometry device (LenSTAR) was used to measure mean corneal power, axial length, and IOL power, calculated with SRK/T, SRK/II, Holladay and Hoffer Q formulas, in the day before trabeculectomy and 3 and 6 months postoperatively. Postoperative measurements were compared with preoperative values and Bland-Altman plots were used to investigate the agreement between pre and postoperative calculated IOL powers.Results: At postoperative months 3 and 6, axial length decreased by 0.14±0.13 and 0.14±0.15 mm (p<0.001) at, respectively and mean corneal power increased by -0.41±0.46 diopter (p<0.001) and -0.27±0.47 diopters (p=0.008), respectively. Calculated IOL powers were not significantly different from preoperative values (SRK/T formula: -0.01±0.64 (p=0.895) at months 3 and -0.2±0.71 diopters (p=0.17) at months 6, SRK/II formula: -0.04±0.76 (p=0.738) at months 3 and -0.2±0.74 diopters (p=0.187) at months 6, Holladay formula: 0.1±0.75 (p=0.427) at months 3 and -0.16±0.79 diopters (p=0.319) at months 6, Hoffer Q formula: 0.09±0.76 (p=0.505) at months 3 and -0.14±0.9 diopters (p=0.442) at months 6).Conclusion: After trabeculectomy, the decrease in axial length negated the increase in corneal power which resulted in a non-significant change in postoperative calculated IOL powers as compared to preoperative values.

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APA: Copy

PAKRAVAN, M., ALVANI, A., JAFARZADEHPOOR, E., TABATABAEI, S.M., YAZDANI, S., & YASERI, M.. (2015). INTRAOCULAR LENS POWER CHANGE AFTER TRABECULECTOMY. BINA, 20(2), 131-138. SID. https://sid.ir/paper/42471/en

Vancouver: Copy

PAKRAVAN M., ALVANI A., JAFARZADEHPOOR E., TABATABAEI S.M., YAZDANI S., YASERI M.. INTRAOCULAR LENS POWER CHANGE AFTER TRABECULECTOMY. BINA[Internet]. 2015;20(2):131-138. Available from: https://sid.ir/paper/42471/en

IEEE: Copy

M. PAKRAVAN, A. ALVANI, E. JAFARZADEHPOOR, S.M. TABATABAEI, S. YAZDANI, and M. YASERI, “INTRAOCULAR LENS POWER CHANGE AFTER TRABECULECTOMY,” BINA, vol. 20, no. 2, pp. 131–138, 2015, [Online]. Available: https://sid.ir/paper/42471/en

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