Determine a Proper Axial Length by Ultrasonic Biometry in Opaque Hydrophilic Acrylic Intraocular Lens.
10.3341/jkos.2008.49.9.1453
- Author:
Sang Hyuk KIM
1
;
Si Hwan CHOI
Author Information
1. Department of Ophthalmology, College of Medicine, Chungnam National University, Daejeon, Korea. shchoi@cnu.ac.kr
- Publication Type:Original Article
- Keywords:
Axial lengths;
Hydrophilic acryl lens;
IOL opacity;
Ultrasonic Biometry
- MeSH:
Biometry;
Eye;
Humans;
Lenses, Intraocular;
Ultrasonics
- From:Journal of the Korean Ophthalmological Society
2008;49(9):1453-1460
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To investigate the accuracy of measuring ultrasonic axial lengths using A-scan (Ocuscan(R), Alcon, USA) on opaque intraocular lenses after hydrophilic lens (ACRL-160(R), Ophthalmed, USA) implantation. METHODS: We measured axial length through ultrasonic biometry prior to intraocular lens exchange. Twelve eyes of 14 patients who had intraocular lens opacity following hydrophilic acryl lens implantation were examined in a clinical study. We compared pre-cataract operative axial lengths to pre-IOL exchange axial lengths. The pre-IOL exchange axial lengths were measured in aphakic and pseudophakic modes. In the pseudophakic mode, the ultrasound velocity through an IOL was set at a rate ranging between 1,500 m/sec to 2,200 m/sec. RESULTS: The pre-IOL exchange axial lengths in the pseudophakic mode at the rate of 1,600 m/sec in lens velocity were the closest to pre-cataract operative values (p=0.88). CONCLUSIONS: When pre-cataract operative axial length is known with a hydrophilic acrylic intraocular lens, previous values may be used for IOL exchange of an opacity patient. If not, however, the closest values to pre-cataract operative axial lengths may be obtained by setting the velocity in the pseudophakic mode to a lens velocity rate of 1,600 m/sec.
