Changing accommodation behaviour during multifocal soft contact lens wear using auditory biofeedback training

Wagner, Sandra; Schaeffel, Frank; Troilo, David

doi:10.1038/s41598-020-61904-4

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…This multifocality and its influence on intermediate and near vision will obviously depend on pupil size, 34 retinal illuminance, 35 and other psychophysical factors such as tolerance to reduced contrast, photic phenomenon (glare, stray light, forward scatter), [36][37][38] and compromised stereopsis. 39 Furthermore, multifocal lens designs have been shown to influence the accommodative response in young nonpresbyopes, 40,41 and it is conceivable that a similar influence is seen on the accommodative and the cross-coupled vergence response of the patient undergoing refractive surgery, [42][43][44] at least up until the onset of presbyopia (typically over a decade for an average patient of keratorefractive surgery). 45 All these issues need further investigation.…”

Section: Discussionmentioning

confidence: 99%

Differences in Image Quality after Three Laser Keratorefractive Procedures for Myopia

et al. 2021

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SIGNIFICANCE: Psychophysical estimates of spatial and depth vision have been shown to be better after bilateral ReLEx small-incision lenticule extraction (SMILE) refractive surgery for myopia, relative to photorefractive keratectomy (PRK) and femtosecond laser-assisted in situ keratomileusis (FS-LASIK). The present study provides the optical basis for these findings using computational image quality analysis.PURPOSE: This study aimed to compare longitudinal changes in higher-order wavefront aberrations and image quality before and after bilateral PRK, FS-LASIK, and SMILE refractive procedures for correcting myopia.METHODS: Wavefront aberrations and image quality of both the eyes of 106 subjects (n = 40 for FS-LASIK and SMILE and n = 26 for PRK) were determined pre-operatively and at 1-week, 1-month, 3-month, and 6-month post-operative intervals using computational through-focus analysis for a 6-mm pupil diameter. Image quality was quantified in terms of its peak value and its interocular difference, residual defocus that was needed to achieve peak image quality (best focus), and the depth of focus. RESULTS:The increase in root mean squared deviations of higher-order aberrations post-operatively was lesser after SMILE (1-month visit median [25th to 75th interquartile range], 0.34 μm (0.28 to 0.39 μm]) than after PRK (0.80 μm [0.74 to 0.87 μm]) and FS-LASIK (0.74 μm [0.59 to 0.83 μm]; P ≤ .001), all relative to pre-operative values (0.20 μm [0.15 to 0.30 μm]). The peak image quality dropped and its interocular difference increased, best focus shifted myopically by 0.5 to 0.75 D, and depth of focus widened significantly after PRK and FS-LASIK surgeries, all relative to pre-operative values ( P < .001). All these changes were negligible but statistically significant in a minority of instances after SMILE surgery ( P ≥ .01).CONCLUSIONS: Although all three refractive surgeries correct myopia, the image quality and its similarity between eyes are better and closer to pre-operative values after SMILE, compared with FS-LASIK and PRK. These results can be explained from the underlying increase in higher-order wavefront aberrations experienced by the eye post-operatively.

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Section: Discussionmentioning

confidence: 99%

Differences in Image Quality after Three Laser Keratorefractive Procedures for Myopia

et al. 2021

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“…The training may cause a reduction of the accommodative lag, which can lead to a slowdown of myopia progression, 270 and may enhance the therapeutic effect of multifocal contact lenses in myopia control. 271…”

Section: Conclusion Contact Lensesmentioning

confidence: 99%

Update and guidance on management of myopia. European Society of Ophthalmology in cooperation with International Myopia Institute

Németh

Tapasztó

Aclimandos

et al. 2021

European Journal of Ophthalmology

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The prevalence of myopia is increasing extensively worldwide. The number of people with myopia in 2020 is predicted to be 2.6 billion globally, which is expected to rise up to 4.9 billion by 2050, unless preventive actions and interventions are taken. The number of individuals with high myopia is also increasing substantially and pathological myopia is predicted to become the most common cause of irreversible vision impairment and blindness worldwide and also in Europe. These prevalence estimates indicate the importance of reducing the burden of myopia by means of myopia control interventions to prevent myopia onset and to slow down myopia progression. Due to the urgency of the situation, the European Society of Ophthalmology decided to publish this update of the current information and guidance on management of myopia. The pathogenesis and genetics of myopia are also summarized and epidemiology, risk factors, preventive and treatment options are discussed in details.

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“…The accommodative stimulus–response varies at different viewing distances. The accommodative lag was quantified as the difference between the accommodative demand and response, and both the accommodative demand and lag increased as the viewing distance decreased [ 19 ]. Normal asymptomatic individuals have an accommodative lag of 0.50 ± 0.25 D during binocular accommodation at a 0.4 m distance [ 20 ]; however, accommodative lag is higher in people with myopia than those with emmetropia [ 8 , 18 , 21 ].…”

Section: Discussionmentioning

confidence: 99%

Immediate Effects of Vergence Exercises Using Automatic Dual Rotational Risley Prisms on Accommodative Lag and Facility

Huang,

Su,

et al. 2023

Ophthalmol Ther

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Introduction This study evaluated novel automatic dual rotational Risley prisms (ADRRPs) as a vergence exercise tool for patients with myopia to improve accommodative lag and accommodative facility. Methods Participants with myopia aged 20–24 years were recruited. After vergence exercises with prisms (treatment group) or plano lenses (control group) using ADRRPs for 10 min, measurements were taken using an open-field autorefractor (Grand Seiko WAM-5500) at viewing distances of 0.4 m and 6.0 m. We measured accommodative facility using a ± 2.00 D accommodative flipper. Results A total of 56 participants (treatment group, 39; control group, 17) performed vergence exercises using ADRRPs. Participants in the treatment group showed improvements in accommodative lag at a 0.4 m viewing distance, with measurements of 0.57 D (right eye; OD) and 0.53 D (left eye; OS) and 0.21 D (OD) and 0.27 D (OS) before and after the exercises, respectively ( p < 0.001). Over-refractions using an open-field autorefractor with spherical equivalent contact lenses at a 6.0 m viewing distance were − 0.01 ± 0.30 D (OD) and 0.03 ± 0.34 D (OS) and 0.15 ± 0.32 D (OD) and 0.19 ± 0.28 D (OS) before and after the exercises, respectively (difference + 0.16 D; p < 0.001). Accommodative facility values before and after exercises were 14.88 ± 3.36 and 15.59 ± 3.60 cpm, respectively ( p < 0.01). No significant differences in accommodative lag, relaxation, and accommodative facility before and after exercise were observed in the control group. Conclusions Using ADRRPs in vergence exercises can improve accommodative lag, accommodative facility, and accommodative relaxation in adults with myopia. Further research to evaluate persistent and long-term effects is needed.

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Changing accommodation behaviour during multifocal soft contact lens wear using auditory biofeedback training

Cited by 7 publications

References 45 publications

Differences in Image Quality after Three Laser Keratorefractive Procedures for Myopia

Differences in Image Quality after Three Laser Keratorefractive Procedures for Myopia

Update and guidance on management of myopia. European Society of Ophthalmology in cooperation with International Myopia Institute

Immediate Effects of Vergence Exercises Using Automatic Dual Rotational Risley Prisms on Accommodative Lag and Facility

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