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. 2023 May;71(5):1837-1842.
doi: 10.4103/ijo.IJO_2027_22.

Multifocal versus modified monovision corrections: A non-dispensing comparison of visual assessment in presbyopic neophytes

Dhruval Parekh  1 , Rashima Asokan  1 , Sutapa Purkait  1 , Asif Iqbal  1
Affiliations

Multifocal versus modified monovision corrections: A non-dispensing comparison of visual assessment in presbyopic neophytes

Dhruval Parekh et al. Indian J Ophthalmol. 2023 May.

Abstract

Purpose: To compare the visual performance of two simultaneous-vision soft multifocal contact lenses and to compare multifocal contact lens and its modified monovision counterpart in presbyopic neophytes.

Methods: A double-masked, prospective, comparative study was conducted on 19 participants fitted with soft PureVision2 multifocal (PVMF) and clariti multifocal (CMF) lenses in random order. High- and low-contrast distance visual acuity, near visual acuity, stereopsis, contrast sensitivity, and glare acuity were measured. The measurements were conducted using multifocal and modified monovision design with one brand and then repeated with another brand of lens.

Results: High-contrast distance visual acuity showed a significant difference between CMF (0.00 [-0.10-0.04]) and PureVision2 modified monovision (PVMMV; -0.10 [-0.14-0.00]) correction (P = 0.003) and also between CMF and clariti modified monovision (CMMV; -0.10 [-0.20-0.00]) correction (P = 0.002). Both modified monovision lenses outperformed CMF. The current study did not show any statistically significant difference between contact lens corrections for low-contrast visual acuity, near visual acuity, and contrast sensitivity (P > 0.01). Stereopsis at near distance was significantly lower with both modified monovision (PVMMV: 70 [50-85]; P = 0.007, CMMV: 70 [70-100]; P = 0.006) and with CMF (50 [40-70]; P = 0.005) when compared to spectacles (50 [30-70]). Glare acuity was significantly lower with multifocal (PVMF: 0.46 [0.40-0.50]; P = 0.001, CMF: 0.40 [0.40-0.46]; P = 0.007) compared with spectacles (0.40 [0.30-0.40]), but no significant difference was noted between the multifocal contact lenses (P = 0.033).

Conclusion: Modified monovision provided superior high-contrast vision compared to multifocal correction. Multifocal corrections performed better for stereopsis when compared to modified monovision. In parameters like low-contrast visual acuity, near acuity, and contrast sensitivity, both the corrections performed similarly. Both multifocal designs showed comparable visual performances.

Keywords: Contrast sensitivity; modified monovision; multifocal contact lens; presbyopia; stereopsis.

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Conflict of interest statement

None

Figures

Figure 1
Figure 1
Box plot of binocular high-contrast distance visual acuity for each correction (Wilcoxon signed-rank tests, P values, post Friedman)
Figure 2
Figure 2
Box plot of binocular low-contrast distance visual acuity for multifocal lenses and modified monovision with baseline
Figure 3
Figure 3
Box plot of binocular high-contrast near visual acuity for multifocal lenses and modified monovision with baseline
Figure 4
Figure 4
Box plot of stereopsis for each correction (Wilcoxon signed-rank tests, P values, post Friedman)
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References

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