Department of Ophthalmology, Kanazawa Medical University, Uchinada, Ishikawa, Japan
In vivo Observation of the Axial Movement of Intraocular Lenses through an Anterior Eye Segment Analysis System
Key Words
Abstract
Anterior eye segment analysis system Scheimpflug photography Image analysis Intraocular lenses Biometry Cyclopentolate Pilocarpine Axial movement
The small axial movement of the anterior surface of implanted intraocular lenses (IOLs) were examined in pseudophakic eyes with one-piece and three-piece IOLs using an anterior eye seg ment analysis system. The movement was calculated as the distance between the posterior surface of the cornea and the anterior surface of an IOL under a normal pupil size, following the instillation of 1% pilocarpine and 1% cyclopentolate solu tions, respectively. The axial movement including movement after instillation of pilocarpine and cyclopentolate was 0.17 ± 0.06, 0.05 ± 0.07 and 0.13 ± 0.06 mm, in phakic eyes and eyes with one-piece and three-piece IOLs, respectively. Image analysis techniques using Scheimpflug images proved its use fulness in the research field of IOL implantation.
Hiroko Nakaizumi Kazuyuki Sasaki Yasuo Sakamoto
Introduction
Evaluation of the postoperative position ing of implanted intraocular lenses (IOLs) has usually been performed through a slit lamp. Although prominent positioning changes can be detected by the above observation, other methods arc necessary for the precise exami
nation of slight changes. To this end, the authors developed a method for measuring implanted IOLs utilizing a Scheimpflug slit image [1, 2], The method remained on the experimental level due to its complicated pro cedures until a newly developed image analy sis device, the anterior eye segment analysis system - Nidek, EAS 1000 - developed by the
Hiroko Nakaizumi. MI) Department of Ophthalmology Kanazawa Medical University Uchinada. Istiikawa 920-02 (Japan)
© 1992 S. Karger AG. Basel 0030-3747/92/ 0247-002IS2.75/0
Downloaded by: Univ. of California Santa Barbara 128.111.121.42 - 3/29/2018 10:36:09 PM
Ophthalmie Res 1992;24(suppl 1): 21-25
Fig. 1. Slit image of the IOLimplantcd eye.
In vivo Observation of the Axial Movement of Intraocular Lenses through an Anterior Eye Segment Analysis System
Key Words
Abstract
Anterior eye segment analysis system Scheimpflug photography Image analysis Intraocular lenses Biometry Cyclopentolate Pilocarpine Axial movement
The small axial movement of the anterior surface of implanted intraocular lenses (IOLs) were examined in pseudophakic eyes with one-piece and three-piece IOLs using an anterior eye seg ment analysis system. The movement was calculated as the distance between the posterior surface of the cornea and the anterior surface of an IOL under a normal pupil size, following the instillation of 1% pilocarpine and 1% cyclopentolate solu tions, respectively. The axial movement including movement after instillation of pilocarpine and cyclopentolate was 0.17 ± 0.06, 0.05 ± 0.07 and 0.13 ± 0.06 mm, in phakic eyes and eyes with one-piece and three-piece IOLs, respectively. Image analysis techniques using Scheimpflug images proved its use fulness in the research field of IOL implantation.
Hiroko Nakaizumi Kazuyuki Sasaki Yasuo Sakamoto
Introduction
Evaluation of the postoperative position ing of implanted intraocular lenses (IOLs) has usually been performed through a slit lamp. Although prominent positioning changes can be detected by the above observation, other methods arc necessary for the precise exami
nation of slight changes. To this end, the authors developed a method for measuring implanted IOLs utilizing a Scheimpflug slit image [1, 2], The method remained on the experimental level due to its complicated pro cedures until a newly developed image analy sis device, the anterior eye segment analysis system - Nidek, EAS 1000 - developed by the
Hiroko Nakaizumi. MI) Department of Ophthalmology Kanazawa Medical University Uchinada. Istiikawa 920-02 (Japan)
© 1992 S. Karger AG. Basel 0030-3747/92/ 0247-002IS2.75/0
Downloaded by: Univ. of California Santa Barbara 128.111.121.42 - 3/29/2018 10:36:09 PM
Ophthalmie Res 1992;24(suppl 1): 21-25
Fig. 1. Slit image of the IOLimplantcd eye.
