Noticeable, troublesome and objectionable limits of blur

Atchison, David A.; Fisher, Scott W.; Pedersen, Carol; Ridall, Gareth

doi:10.1016/j.visres.2005.01.022

Cited by 65 publications

(80 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unless the limiting aperture of the eye is reduced, then the effect of a small degree of squint will be negligible. Indeed, Atchison, Fisher, Pedersen, and Ridall (2005) reported that as long as the pupil diameter exceeded 3 mm, then the effect of varying pupil size on noticeable blur was minimal. It is unclear whether a voluntary effort to squint corresponding to just 5% of the maximum possible effort would be sufficient to reduce the diameter of the limiting aperture below 3 mm.…”

Section: Discussionmentioning

confidence: 99%

Cognitive demand, digital screens and blink rate

Rosenfield

Jahan

Nunez

et al. 2015

Computers in Human Behavior

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Cognitive demand, digital screens and blink rate

Rosenfield

Jahan

Nunez

et al. 2015

Computers in Human Behavior

View full text Add to dashboard Cite

“…Epiretinal membrane peeling shows similarly successful visual outcomes, with reported mean visual improvement of 0.3 logMAR and mean postoperative visual acuity of 6/12. 10 At these high levels of visual acuity, noticeable blur limits are much smaller 11 and consequently a SIA of 0.27 D is expected to go unnoticed by the patient whereas 0.66 D may be visually detectable, 12 possibly requiring a new spectacle prescription.…”

Section: Discussionmentioning

confidence: 99%

A comparison of induced astigmatism in 20- vs 25-gauge vitrectomy procedures

Galway

Drury

Cronin

et al. 2009

Eye

View full text Add to dashboard Cite

Introduction Surgically induced astigmatism is an unwanted variable that can lead to poorer visual and refractive outcomes in patients undergoing vitrectomy even when a technically precise procedure has been performed. This study assesses the difference in surgically induced astigmatism (SIA) between the traditional 20-gauge vitrectomy and the newer 25-gauge sutureless technique by comparing pre-and post-procedure keratometry readings. Method The study is a retrospective consecutive case series of vitrectomies performed by a single surgeon. There were a total of 47 patients, eight with bilateral procedures, 24 who underwent the 20 gauge, and 31 who had the 25-gauge procedure. Patients were excluded for corneal altering pathology or scleral buckling procedures. Vector analysis of pre-and post-vitrectomy readings was performed using Alpin's method, facilitated by the ASSORT program version 4.1. Results Mean time at which post-operative keratometry readings were taken was 3.9 months (1-36).

show abstract

“…It is known that horizontal blur of letters has a greater impact on legibility than other orientations [4,10,46] and that neural adaptations, affecting clear vision determination and blur sensitivity, may occur in the presence of astigmatism [47][48][49]. However, in the present study, we measured UDVA with a Landolt ring, not a letter chart.…”

Section: Discussionmentioning

confidence: 88%