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Dong Cheol Lee, Yu Cheol Kim, Kwang Soo Kim; The Discrepancy between Predicted and Actual Refractive Errors According to Combined or Sequential Cataract Surgery in Vitrectomised Eyes. Invest. Ophthalmol. Vis. Sci. 2011;52(14):532.
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To evaluate the difference between preoperatively predicted refractive errors and postoperative actual refractive errors according to combined or sequential cataract surgery in vitrectomy with or without gas tamponade.
Thirty five patients(35 eyes) received combined surgery during vitrectomy and twenty six patients(26 eyes) underwent cataract surgery 3 months or later after vitrectomy were assigned to Group 1 and Group 2, respectively. Two groups were compared the discrepancy between predicted and actual refractive errors (DPARE) according to the procedures of gas tamponade or not at least 2 month after cataract surgery. Eyes affecting postoperative refractions, such as corneal or retinal complication, were excluded.
DPARE in Group 1 and Group 2 was +0.41±1.23 D and +0.37±0.93 D, respectively and there was no statistically significant difference between two groups. In Group 1, DPARE was -0.35±0.59 D in 12 eyes with gas tamponade and +0.77±1.35 D in eyes without gas tamponade. There was a statistically significant difference (p=0.01) between both subgroups of Group 1. In Group 2, however, DPARE of patients with (9 eyes) or without gas tamponade (17 eyes) was +0.29±0.76 D , +0.58±0.91 D, respectively and there was no statistically significant difference between them . In comparing between subgroups with gas tamponade procedure in Group1 and Group 2, DPARE was -0.35±0.59 D and +0.29±0.76 D, respectively (p=0.04).
This study shows that we should consider myopic shift in combined cataract and vitrectomy surgery with gas tamponade due to possible forward displacement of the intraocular lens.
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