Blur adaptation: clinical and refractive considerations

Cufflin, Matthew P; Mallen, Edward A. H.

doi:10.1111/cxo.13033

Cited by 9 publications

(11 citation statements)

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“…22,37 However, it is not appropriate as this end point represents the eye's optical state that optimizes visual resolution, which may be influenced by factors other than just the eye's refractive error (for example, neural sensitivity to blur). 38 Accuracy estimates may vary with the individual's definition of optimal visual experience, independent of its technique. For both reasons above, retinoscopy measurements obtained in this study may be considered as an error-free, gold-standard reading.…”

Section: Discussionmentioning

confidence: 99%

Does the Accuracy and Repeatability of Refractive Error Estimates Depend on the Measurement Principle of Autorefractors?

Padhy

Nayak

Rath

et al. 2021

Trans. Vis. Sci. Tech.

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Section: Discussionmentioning

confidence: 99%

Does the Accuracy and Repeatability of Refractive Error Estimates Depend on the Measurement Principle of Autorefractors?

Padhy

Nayak

Rath

et al. 2021

Trans. Vis. Sci. Tech.

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“…Participants found benefits to utilising blur adaptation, and it was an incentive to avoid glasses wear for many. Indeed, with improvements of up to nearly three lines in VA (0.27 logMAR) following exposure to myopic defocus, 30 participants with lower levels of myopia may be enjoying better levels of unaided vision than their prescription suggests. Participants assumed that a prolonged period without glasses was needed to utilise blur adaptation.…”

Section: Discussionmentioning

confidence: 99%

“…Participants assumed that a prolonged period without glasses was needed to utilise blur adaptation. In fact, improvements in vision due to blur adaptation have been shown in just a few minutes, 43 and there may be little further improvement in vision after half an hour 30 . It seems important that optometrists discuss blur adaptation with patients, including the likely time course, to ensure that they do not avoid wearing their correction for vision‐critical tasks such as driving 35,44–47 .…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, blur adaptation can influence patients' subjective perception of how blurred an image appears 32 . Adaptation effects have been shown after just a few minutes of exposure to blur and, once established, the effects can be persistant 30 . Astigmatic blur adaptation, with meridional adaptation effects, has also been demonstrated 33,34 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

What are patients' beliefs about, and experiences of, adaptation to glasses and how does this affect their wearing habits?

Hughes

Fylan

Elliott

2021

Ophthalmic Physiologic Optic

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Purpose It is well known that some patients experience difficulties adapting to new glasses. However, little is known about what patients themselves understand of the adaptation process, and how this influences their attitudes and the decisions they make when adapting to a new pair of glasses. Nor is it understood whether these factors affect their wearing habits. Methods We conducted four focus groups. Participants were 22 glasses wearers (mean ± SD age 43 ± 14 years, range 21–71 years) who reported they: (1) wore spectacle correction for distance vision (single vision, bifocal or progressive lenses); (2) had struggled to get used to a new pair of glasses and (3) sometimes chose not to wear their distance correction. Focus groups were audio recorded, transcribed verbatim and analysed thematically. Results We identified three themes. Trust is about how participants' trust in their optometrist and themselves influences the likelihood of them adapting successfully to new glasses. Conflict describes how the advice patients have received about adapting to glasses can conflict with what they have experienced and how this conflict influences their expectations. Part of Me explores how participants' experiences and feelings about their glasses are important to adaptation and this includes physical, visual, emotional and behavioural aspects. Conclusions The traditional optometric perspective of adaptation to glasses is much narrower than that held by patients, and significantly underestimates the physical, behavioural and emotional adaptation that patients must go through in order to feel fully comfortable wearing their glasses. Patients should receive significantly more information about adaptation, including symptoms that may be experienced and why these happen, practical tips to aid adaptation, and when and how to raise concerns. Patients should also receive information about the day‐to‐day effects of blur adaptation to avoid them not wearing their glasses, including for vision‐critical tasks such as driving.

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“…Del Aguila‐Carrasco et al review work examining the changes in higher order aberrations associated with accommodation, and reciprocally, the changes in the accommodation response when specific higher order aberrations are manipulated. Cufflin and Mallen also investigate the adaptive changes in the visual system in response to imposed blur. These papers are particularly relevant to optical interventions designed to manipulate the visual experience and slow eye growth in children which alter peripheral refraction, higher order aberrations, visual quality and potentially the accommodation response.…”

mentioning

confidence: 99%