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Noticeable, troublesome and objectionable limits of blur
We investigated limits at which induced blur becomes noticeable, troublesome and objectionable. We used 15 cyclopleged subjects, a Badal optometer with lines of three high contrast letters asExpand
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Spectacle Lenses Designed to Reduce Progression of Myopia: 12-Month Results
Purpose. To report the results of 12-month wear of three novel spectacle lens designs intended to reduce peripheral hyperopic defocus and one standard design control lens and their effect on theExpand
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Limits of spherical blur determined with an adaptive optics mirror
We extended an earlier study (Vision Research, 45, 1967–1974, 2005) in which we investigated limits at which induced blur of letter targets becomes noticeable, troublesome and objectionable. Here weExpand
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Blur limits for defocus, astigmatism and trefoil
We investigated the limits at which blur due to defocus, crossed-cylinder astigmatism, and trefoil became noticeable, troublesome or objectionable. Black letter targets (0.1, 0.35 and 0.6 logMAR)Expand
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Progress in the spectacle correction of presbyopia. Part 2: Modern progressive lens technologies
The first instalment of this two‐part series reviewed the fundamental optical principles and early development work associated with progressive lenses. Recent progress made in advancing the state ofExpand
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Visual Ergonomics, Blur Tolerance and Progressive Lens Design
Ergonomic data was gathered for subjects reading in a "natural" position. Estimates of eye declination, reading distance and horizontal eye movement were found. Objective and subjective thresholdsExpand
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Vertical lens placement as a determinant of acceptance for access near vision lenses
Data were extracted from a recent trial of SOLA ACCESSSTM lenses to examine the effect of vertical lens placement on lens acceptance. In that trial patients wore identical frames with either singleExpand
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Element de lentille ophthalmologique pour corriger la myopie
L’invention concerne un element de lentille ophtalmologique (100) pour corriger la myopie affectant un œil d’un utilisateur. L’element de lentille (100) comporte une zone centrale (102) et une zoneExpand