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Mao Kusano, Eiko Tsuiki, Masafumi Uematsu, Azusa Fujikawa, Takeshi Kumagami, Kiyoshi Suzuma, Takashi Kitaoka; Changes In Anterior Chamber Depth And Refractive Power After Cataract Surgery With Or Without Simultaneous Vitreous Surgery. Invest. Ophthalmol. Vis. Sci. 2012;53(14):6657.
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© ARVO (1962-2015); The Authors (2016-present)
We previously reported that anterior chamber depth deepened in both cases, after cataract surgery with or without simultaneous vitreous surgery, and the myopic change increased significantly with simultaneous vitreous surgery than without vitreous surgery by using Pentacam Scheimpflug imaging system (OCULUS Inc) and contact ultrasound biometer (TOMEY). This is an observational study of changes in anterior chamber depth and refractive power in same patients for 1 year after surgery by using IOL Master (Carl Zeiss Inc) instead of Pentacam and contact ultrasound biometer.
Measurements were made on 28 eyes of 22 patients who underwent cataract surgery (PEA group) and 30 eyes of 30 patients who underwent cataract surgery with simultaneous vitreous surgery (Vit group) between March 2008 and April 2010 at Nagasaki University Hospital. Vitrectomy was performed for macular hole or epiretinal membrane. Intraocular lenses were fixed in the bag and all the eyes received SA60AT intraocular lense (Alcon Inc) implantation. The anterior chamber depth, radius of corneal curvature, and axial length were measured with IOL Master before, immediately after, as well as 1, 3, 6 and 12 months after surgery. We also investigated postoperative differences between actual and predicted refractive power.
The mean anterior chamber depth (mm) before surgery was 3.00 ± 0.42 in the PEA group and 3.11 ± 0.42 in the Vit group, and was significantly deeper at all measurements after surgery (P<0.05, P<0.01,respectively). The mean refractive power immediately after surgery was -0.45 ± 0.57D in the PEA group, and -0.26 ± 0.61D in the Vit group. There were no differences in mean refractive power at any time points after surgery between the groups. No correlation between anterior chamber depth and refractive power was found.
Depth of the anterior chamber significantly deepened after surgery in both the PEA and Vit groups. Contact ultrasound biometer measurements showed that the myopic change increased significantly after surgery in the Vit group compared to that in the PEA group. No differences in postoperative refractive power between the groups were found using IOL Master, suggeting that vitreous surgery might not influence refractive power. In case of vitrectomy for macular hole or epiretinal membrane, the IOL Master is better for assessing postoperative refractive power.
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