Abstract：
:Some results from a survey of 43 patients who had a monofocal intra-ocular-lens (IOL) in one eye and a concentric bifocal intra-ocular-lens in the fellow eye are reported. Twenty patients with 6/9 or better post-operative visual acuity in both eyes, participated in the main part of the study. Optical transfer functions for the bifocal lens showed that, compared to an optimal single-vision correction, there is a 50% contrast degradation of the distance retinal image across all spatial frequencies above around 3 c/deg. For the patients in the main study, there was a close correspondence between practical measurement of contrast sensitivity and the theoretical predictions of the modulation transfer functions. Measuring contrast sensitivity proved an effective means of assessing misalignment of the bifocal IOLs.
journal_name
Vision Resjournal_title
Vision researchauthors
Charman WN,Murray IJ,Nacer M,O'Donoghue EPdoi
10.1016/s0042-6989(97)00447-1subject
Has Abstractpub_date
1998-09-01 00:00:00pages
2841-53issue
18eissn
0042-6989issn
1878-5646pii
S0042-6989(97)00447-1journal_volume
38pub_type
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