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Optical performance in rezoom and array multifocal intraocular lenses in vitro.
Takushi Kawamorita1, Hiroshi Uozato, Daisuke Aizawa
1Department of Orthoptics and Visual Science, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Sagamihara, 228-8555, Japan. dm05011c@st.kitasato-u.ac.jp
Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|June 11, 2009
Summary
The ReZoom intraocular lens (IOL) offers superior distant vision compared to the Array IOL. Optimal near vision with ReZoom multifocal IOLs requires a pupil diameter of at least 3.45 mm.
Area of Science:
- Ophthalmology
- Optical Engineering
Background:
- Multifocal intraocular lenses (IOLs) are used to correct vision after cataract surgery.
- Assessing the modulation transfer function (MTF) is crucial for evaluating IOL image quality.
Purpose of the Study:
- To compare the modulation transfer function (MTF) of two refractive multifocal intraocular lenses (IOLs): ReZoom and Array.
- To evaluate image quality across different focus lengths and pupil sizes.
Main Methods:
- Utilized the OPAL Vector system and a model eye with a variable aperture (2.1–5.5 mm).
- Measured MTF at distant, near, and intermediate (-1.50 diopter defocus) focus lengths for ReZoom and Array IOLs.
Main Results:
- ReZoom IOL demonstrated a higher distant focus MTF than the Array IOL at a 5.1-mm effective diameter.
- ReZoom showed a slight MTF increase at intermediate distances compared to Array.
- Near focus MTF for ReZoom improved with pupil diameter, stabilizing above 3.45 mm.
Conclusions:
- The ReZoom IOL provides better overall image quality, especially for distant vision, compared to the Array IOL.
- A minimum pupil diameter of 3.45 mm is recommended for optimal near vision enhancement with the ReZoom lens.
