Visual Performance of Subjects Wearing Presbyopic Contact Lenses

Abstract

Subjects wearing GP multifocals, soft bifocals, monovision, and PAL spectacles have good binocular contrast sensitivity, satisfactory binocular low and high contrast acuity, and increased sensitivity to glare. Presbyopic subjects requiring the use of contact lenses under dim light levels could benefit from GP multifocal lenses. Contrast and glare sensitivity evaluations provide significant information regarding the visual performance of the presbyopic contact lenses and should be included in regular presbyopic contact lens fitting.

Early Symptomatic Presbyopes—What Correction Modality Works Best?

“…Stereopsis is often reported as being poor in the monovision modality but there was no statistical difference apparent in this study, perhaps because all participants were emerging, low addition presbyopes. Previous studies have been contradictory in 8 and inferior 18 to multifocal contact lenses. Conversely, from the subjective perspective, monovision was the lowest performer in all of the subjective ratings that demonstrated any significant difference between modalities and the multifocal was the highest performer in 15 of these 16 subjective ratings that demonstrated significance, particularly in relation to driving at dusk/night, watching television, and changing focus.…”

Adaptation to Multifocal and Monovision Contact Lens Correction

“…As expected, the stereoacuity was significantly poorer with MV than with the MF contact lens, which agreed with previously reported findings. 5,6,8,14 This can be explained by the effects of monocular blurring produced by MV on stereoacuity, which is larger than the binocular defocus effects produced by retinal images superimposed on MF lenses. 15 Furthermore, the values for this parameter in the MV group were scattered, and the differences prevailed even after 15 days of adaptation.…”

Short-term comparison between extended depth-of-focus prototype contact lenses and a commercially-available center-near multifocal

“…Unlike non-monotonic zonal-refractive multifocals, 10 center-near CLs are pupil-dependent 11 . However, simultaneously focused and defocused retinal images can lead to decreased quality of vision,1, 12, 13 decreased contrast sensitivity13, 14 and ghosting 13, 15. Despite these limitations, good visual outcomes have been reported with some center-near designs12, 16, 17, 18, 19, 20, 21 with some studies reporting similar12, 19 or better12, 16 outcomes compared to a zonal-refractive multifocal.…”