Pseudophakic monovision is an important surgical approach to being spectacle-free

Xiao, Jianguo; Jiang, Caihui; Zhang, MaoNian

doi:10.4103/0301-4738.86318

Cited by 26 publications

(16 citation statements)

References 36 publications

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“…It remains to be seen whether these transmittance differences would cause a cosmetic impediment for everyday wear. If so, we note that the issue is likely to occur only for anti-Pulfrich corrections prescribed with contact lenses, and not with surgically-implanted intraocular lenses 22 , 23 . Contact lenses cover the iris and are visible, and intraocular lenses are inserted into the capsular bag and are generally not visible.…”

Section: Discussionmentioning

confidence: 97%

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Contact lenses, the reverse Pulfrich effect, and anti-Pulfrich monovision corrections

Rodríguez-López

Dorronsoro

Burge

2020

Sci Rep

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Interocular differences in image blur can cause processing speed differences that lead to dramatic misperceptions of the distance and three-dimensional direction of moving objects. This recently discovered illusion—the reverse Pulfrich effect—is caused by optical conditions induced by monovision, a common correction for presbyopia. Fortunately, anti-Pulfrich monovision corrections, which darken the blurring lens, can eliminate the illusion for many viewing conditions. However, the reverse Pulfrich effect and the efficacy of anti-Pulfrich corrections have been demonstrated only with trial lenses. This situation should be addressed, for clinical and scientific reasons. First, it is important to replicate these effects with contact lenses, the most common method for delivering monovision. Second, trial lenses of different powers, unlike contacts, can cause large magnification differences between the eyes. To confidently attribute the reverse Pulfrich effect to interocular optical blur differences, and to ensure that previously reported effect sizes are reliable, one must control for magnification. Here, in a within-observer study with five separate experiments, we demonstrate that (1) contact lenses and trial lenses induce indistinguishable reverse Pulfrich effects, (2) anti-Pulfrich corrections are equally effective when induced by contact and trial lenses, and (3) magnification differences do not cause or impact the Pulfrich effect.

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Section: Discussionmentioning

confidence: 97%

“…Monovision prescriptions are most commonly prescribed with contact lenses 21 . (Surgically implanted interocular lenses are second most common 22 – 24 .) Hence, it is important to demonstrate that anti-Pulfrich corrections are effective when implemented with the ophthalmic corrections that are most relevant to clinical practice.…”

Section: Introductionmentioning

confidence: 99%

Contact lenses, the reverse Pulfrich effect, and anti-Pulfrich monovision corrections

Rodríguez-López

Dorronsoro

Burge

2020

Sci Rep

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“…However, to achieve satisfactory near vision, one needs to perform traditional monovision, ie anisometropia of −1.50 D or above, which may be associated with various side effects and reduced patient satisfaction. 18 , 19 The advantage of hybrid monovision with ERV IOLs is that good near vision outcomes may be achieved by performing mini-monovision, thus avoiding most of the bothersome disadvantages of the traditional monovision.…”

Section: Discussionmentioning

confidence: 99%

Visual and Refractive Outcomes and Patient Satisfaction Following Implantation of Monofocal IOL in One Eye and ERV IOL in the Contralateral Eye with Mini-Monovision

Brar¹,

Ganesh²,

Arra³

et al. 2021

OPTH

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Title Visual and refractive outcomes and patient satisfaction following implantation of monofocal intraocular lens in one eye and ERV intraocular lens in the contralateral eye with mini-monovision. Purpose To evaluate the outcomes following implantation of monofocal intraocular lens in one eye and ERV intraocular lens in the contralateral eye with mini-monovision. Methods Twenty-five subjects underwent bilateral cataract surgery, wherein the dominant eye received monofocal Tecnis-1 IOL, while in the contralateral eye received the Tecnis Symphony ERV IOL. The dominant eye was targeted for emmetropia and the non-dominant eye for myopia of −0.50 to −0.75D. Binocular uncorrected and corrected distance (UDVA, CDVA), intermediate (UIVA, CIVA), and near (UNVA, DCNVA) visual acuity; reading speeds, defocus curve and contrast sensitivity were studied at 6 months post-operatively. Results At 6 months post-operatively the mean binocular UDVA, CDVA, UNVA and DCNVA were 0.007±0.07, −0.13±0.06, 0.26±0.09 and 0.44±0.10 LogMAR, respectively. Binocular UIVA and DCIVA at 60 cm were 0.22±0.10 and 0.18±0.08 LogMAR and at 80 cm was 0.16±0.11 and 0.15±0.10 LogMAR, respectively. Mean uncorrected reading speeds evaluated with SRD at 40, 60 and 80 cm were 114.4±6.9, 126.4±7.9 and 123.16±5.8 words per minute. Contrast sensitivity values did not show significant difference for any spatial frequency tested. At 6 months, only 12% (3 patients) reported mild halos. Spectacle independence satisfaction scores were 96%, 100% and 88% for distance, intermediate and near. Conclusion Implantation of monofocal intraocular lens in one eye and ERV intraocular lens in the contralateral with mini-monovision resulted in good outcomes for far and intermediate, and satisfactory outcomes for near vision, with good tolerance to mini-monovision at the end of 6 months.

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“…It remains to be seen whether these transmittance differences would cause a cosmetic impediment for everyday wear. If so, we note that the issue is likely to occur only for anti-Pulfrich corrections prescribed with contact lenses, and not with surgically-implanted intraocular lenses (Davidson et al, 2016;Xiao et al, 2011). Contact lenses cover the iris and are visible, and intraocular lenses are inserted into the capsular bag and are generally not visible.…”

Section: Anti-pulfrich Monovision Corrections: Potential and Limitationsmentioning

confidence: 99%

Contact lenses can cause the reverse Pulfrich effect and anti-Pulfrich monovision corrections can eliminate it

Rodríguez-López

Dorronsoro

Burge

2020

Preprint

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Interocular differences in image blur can cause dramatic misperceptions of the distance and three-dimensional direction of moving objects. This new illusion-the reverse Pulfrich effect-is caused by the optical conditions induced by monovision, a common correction for presbyopia. Fortunately, anti-Pulfrich monovision corrections, in which the blurring lens is slightly darkened, can eliminate the illusion for a wide range of viewing conditions. However, the reverse Pulfrich effect and the efficacy of anti-Pulfrich corrections have previously been demonstrated only with trial lenses. This situation should be addressed, for both clinical and scientific reasons. First, monovision is most commonly prescribed with contact lenses. It is important to replicate these effects in the most common monovision delivery system. Second, trial lenses of different powers, unlike contacts, cause large magnification differences between the eyes. To confidently attribute the reverse Pulfrich effect to differences in optical blur between the eyes, and to ensure that the reported effect sizes are reliable, one must control for magnification. Here, in a within observer study with five separate experiments, we demonstrate i) that contact lenses induce reverse Pulfrich effects that are indistinguishable from those induced by trial lenses, ii) that overall magnification differences do not cause or impact the Pulfrich effect, and iii) that anti-Pulfrich corrections (i.e. darkening the blurring lens) are equally effective when induced by contact lenses and by trial lenses.

show abstract

Pseudophakic monovision is an important surgical approach to being spectacle-free

Cited by 26 publications

References 36 publications

Contact lenses, the reverse Pulfrich effect, and anti-Pulfrich monovision corrections

Contact lenses, the reverse Pulfrich effect, and anti-Pulfrich monovision corrections

Visual and Refractive Outcomes and Patient Satisfaction Following Implantation of Monofocal IOL in One Eye and ERV IOL in the Contralateral Eye with Mini-Monovision

Contact lenses can cause the reverse Pulfrich effect and anti-Pulfrich monovision corrections can eliminate it

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