JOURNAL OF SHANDONG UNIVERSITY (OTOLARYNGOLOGY AND OPHTHALMOLOGY) ›› 2017, Vol. 31 ›› Issue (4): 5-8.doi: 10.6040/j.issn.1673-3770.1.2017.024

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Effects of mydriasis on anterior chamber parameters measured by a Pentacam before and after cataract surgery.

YANG Yuhuan1, ZHANG Jie1, ZHANG Jinpeng1, YAN Hong1,2   

  1. 1. Department of Ophthalmonogy, Tangdu Hospital, the Fourth Military Medical University, Xian 710038, Shaanxi, China;2. The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing 400016, China
  • Received:2017-07-07 Online:2017-08-16 Published:2017-08-16

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Abstract: Objective To observe the effect of mydriasis on center anterior chamber depth, anterior chamber volume, corneal surface keratometry and astigmatism before and after cataract surgery. Methods This study included 25 eyes of 22 patients diagnosed with cataract and indicated for phacoemulsification with intraocular lens(IOL)implantation at Tangdu Hospital, the Fourth Military Medical University.For each patient, anterior segment parameters were measured 1-2 days before and after surgery, respectively, using a Pentacam HR system under conditions of normal pupils and dilated pupils. Results The mean preoperative central anterior chamber depths were(2.71±0.56)mm and(2.79±0.53)mm before and after mydriasis, respectively(t=-4.246; P<0.001). The mean postoperative central anterior chamber depths were(3.60±0.98)mm and(4.45±0.35)mm before and after mydriasis, respectively(t=-4.473;P<0.001). The mean postoperative anterior chamber volumes were(146.9±37.1)mm3 and(163.3±33.9)mm3 before and after mydriasis, respectively(t=-3.633;P= 0.001). Conclusions The central anterior chamber depths before and after cataract surgery and the anterior chamber volumes after cataract surgery increase after mydriasis, which may lead to errors in IOL calculation. In patients with cataracts, the central anterior chamber depths and anterior chamber volumes should be measured before mydriasis.

Key words: Pentacam, Cataract, Mydriasis, Tropicamide phenylephrine eye drops, Anterior segment parameters

CLC Number: 

  • R776.1
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