Modulation transfer function of implantable phakic intraocular contact lens (IPCL) for myopia and presbyopia
- 06.06.2024
- Basic Science
Erschienen in:
- Verfasst von
- Chunjing Yu
- Kazutaka Kamiya
- Takushi Kawamorita
Abstract
Purpose
This study aimed to assess the optical quality of myopic and presbyopic IPCLs with different additional powers, and to investigate the effects of pupil size on the optical quality of these IPCLs using an in-vitro modulation transfer function (MTF) measurement system.
Methods
Linear scatter functions (LSFs) were recorded using the OPAL Vector system and an eye phantom consisting of wet cells filled with a balanced salt solution. A myopic IPCL or a presbyopic IPCL was placed in the posterior chamber of this model. The MTF was calculated from the LSF using the fast Fourier transform techniques. The effective apertures were set at 2.0 to 5.0 mm in 1.0 mm steps.
Results
The in-focus MTF values of the myopic IPCL and presbyopic IPCL with additional powers of + 2.0 and + 4.0 diopters at 100 cycles/mm for an effective aperture of 3.0 mm were 43%, 27%, and 24%, respectively. The in-focus MTF value of both myopic and presbyopic IPCLs was the highest when the effective aperture was set at 3.0 mm, and it gradually worsened when the effective aperture became larger than 3.0 mm at 20, 60, and 100 cycles/mm.
Conclusions
Both myopic and presbyopic IPCLs provided excellent MTF values, but the additional power profile can deteriorate optical performance in presbyopic IPCL-implanted eyes, even with a low additional power. Pupil size can influence visual quality in IPCL-implanted eyes for both myopia and presbyopia.
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- Titel
- Modulation transfer function of implantable phakic intraocular contact lens (IPCL) for myopia and presbyopia
- Verfasst von
-
Chunjing Yu
Kazutaka Kamiya
Takushi Kawamorita
- Publikationsdatum
- 06.06.2024
- Verlag
- Springer Berlin Heidelberg
- Erschienen in
-
Graefe's Archive for Clinical and Experimental Ophthalmology / Ausgabe 10/2024
Print ISSN: 0721-832X
Elektronische ISSN: 1435-702X - DOI
- https://doi.org/10.1007/s00417-024-06539-1
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