Visual Performance of Center-distance Multifocal Contact Lenses Fit Using a Myopia Control Paradigm

Gregory, Hannah R; Nti, Augustine N; Wolffsohn, James S.; Berntsen, David A.; Ritchey, Eric R

doi:10.1097/opx.0000000000001665

Cited by 21 publications

(30 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This difference likely occurs because the larger pupil sizes under mesopic conditions expose the eye to more plus power in the multifocal contact lens optics, which can lead to further degradation of retinal image quality 29 . This finding is also consistent with previously reported higher reduction in visual acuity from photopic to mesopic lighting with the multifocal contact lenses than with the single vision contact lens 13 …”

Section: Discussionsupporting

confidence: 93%

“…Based on these results, the question of whether these reductions in contrast sensitivity extend into higher spatial frequencies beyond what were measured comes to mind. As previously reported, 13,14,16,30 there are no clinically significant differences in photopic visual acuity between multifocal contact lenses and single vision lenses, which shows that the high spatial frequency cutoff remains unaffected. However, under mesopic conditions, a significant reduction in visual acuity with the multifocal contact lenses is observed in addition to the reduction in the area under the log contrast sensitivity function, demonstrating that the high spatial frequency cutoff is also reduced under mesopic conditions.…”

Section: Discussionsupporting

confidence: 81%

“…This study was part of a larger study to determine visual performance with multifocal contact lenses 13 . A sample size of 24 subjects was calculated to give the study 90% power to determine a 0.1 logMAR (one line) difference in low-contrast visual acuity between lens designs at an α level of 0.05, assuming a known standard deviation of 0.15 logMAR.…”

Section: Methodsmentioning

confidence: 99%

“…We previously reported visual performance including high- and low-contrast logMAR visual acuity under photopic and mesopic conditions, and near high-contrast visual acuity with these three lenses 13 . Photopic high-contrast logMAR visual acuity (mean ± SD) was very similar between lenses (Biofinity sphere, −0.18 ± 0.06; Biofinity Multifocal D, −0.14 ± 0.08; NaturalVue Multifocal, −0.15 ± 0.03).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Contrast Sensitivity with Center-distance Multifocal Soft Contact Lenses

Nti¹,

Gregory

Ritchey

et al. 2022

Optom Vis Sci

Self Cite

View full text Add to dashboard Cite

SIGNIFICANCE:The contrast sensitivity (CS) function provides a more detailed assessment of vision than visual acuity. It was found that center-distance multifocal contact lens designs that are increasingly being prescribed for myopia control reduce distance photopic and mesopic CS in nonpresbyopic patients across a range of spatial frequencies. PURPOSE: This study aimed to determine the effect of center-distance multifocal soft contact lenses (MFCLs) on CS under photopic and mesopic conditions in nonpresbyopic patients. METHODS: Twenty-five myopic, nonpresbyopic adults were fitted binocularly with three lenses: Biofinity single vision contact lens (SVCL), Biofinity Multifocal D +2.50 add, and NaturalVue Multifocal in random order. Contrast sensitivity was measured at distance (4 m) under photopic and mesopic conditions and at near under photopic conditions. Log CS by spatial frequency and area under the log contrast sensitivity function (AULCSF) were analyzed between lenses.RESULTS: Distance photopic CS at each spatial frequency was higher with the SVCL than the MFCLs ( P < .001), but there was no difference between the MFCLs ( P = .71). Distance mesopic CS from 1.5 to 12 cycles per degree (cpd) was higher with the SVCL than the MFCLs (all P < .02); however, at 18 cpd, there was no difference in CS between NaturalVue and the SVCL ( P = .76), possibly because of spurious resolution. Photopic AULCSF for the SVCL was roughly 10% greater than both MFCLs. Contrast sensitivity at near was generally similar between lenses, only slightly lower with the NaturalVue at 11 and 15.5 cpd, but AULCSF at near was not different between lenses ( P > .05). CONCLUSIONS:Multifocal contact lenses reduce distance contrast sensitivity under both photopic and mesopic conditions. There is no clinically significant difference in near CS among all three lenses. These data show that MFCLs have effects on vision that are not captured by standard high-contrast visual acuity testing.

show abstract

Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 81%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Contrast Sensitivity with Center-distance Multifocal Soft Contact Lenses

Nti¹,

Gregory

Ritchey

et al. 2022

Optom Vis Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…Many studies have been performed using the Shin-Nippon/Grand-Seiko range of open-space autorefractors. [1][2][3][4][5][6][7][8][9][10] Some of the features of the different versions have been described in the optometric literature. [11][12][13][14] The most noticeable variations between versions are in the shape and size of radiation onto the pupil and retina.…”

Section: Introductionmentioning

confidence: 99%

The use of autorefractors using the image‐size principle in determining on‐axis and off‐axis refraction. Part 2: Theoretical study of peripheral refraction with the Grand Seiko AutoRef/Keratometer WAM‐5500

Atchison

Suheimat

Zacharovas

et al. 2021

Ophthalmic Physiologic Optic

View full text Add to dashboard Cite

Purpose: To determine, through simulations, the likely validity of Grand-Seiko autorefractors with annular targets in peripheral refraction.Methods: Using a physical model eye, the distance inside the eye to which the Grand Seiko AutoRef/Keratometer WAM-5500 beam was converging and the effective size of its outer diameter at the cornea were determined. Grand-Seiko refraction was calculated from R x = (θ + α)/h 1 , where θ is the angle of the ingoing radiation beam, h 1 is the height of the beam at the anterior cornea and α is the angle of the beam emerging from the eye following reflection at the retina. Two eye models were used: a Navarro schematic eye and a Navarro schematic eye with a contact lens having a highly positive aspheric front surface. Results:The instrument beam was determined to be converging towards the eye to a distance of 24.4 mm behind the corneal vertex, with a 2.46 mm effective size outer diameter of the beam at the anterior cornea. The Grand-Seiko refractions provided accurate estimates of peripheral refraction for the model eyes.The results were closer to Zernike refractions than to Zernike paraxial refraction. Spherical aberration influenced refraction by up to 0.5 D, and peripheral coma had limited influence. Conclusion:Grand-Seiko autorefractors in current use, and having a circular annulus with an ingoing effective outer diameter at the front of the eye of about 2.4 mm, are likely to give valid peripheral refractions.

show abstract