Optometry and Vision Science

SIGNIFICANCE

This study highlights the importance of twilight adaptation for reliable assessment of low-luminance visual acuity and understanding the relationship between low-luminance visual acuity and ocular aberrations.

PURPOSE

The human eye experiences reduced visual acuity as luminance decreases owing to reduced retinal and optical resolutions; however, the details are unclear. This study aimed to quantify the effects of refraction, pupil diameter, and ocular aberrations on visual acuity during the transition from high- to low-light environments, thereby contributing to the standardization of low-luminance visual acuity measurements.

METHODS

In total, 27 older participants with a mean age of 70.0 ± 4.1 years were included in this study. Visual acuity was measured according to the Early Treatment Diabetic Retinopathy Study (ETDRS) protocol with three luminance conditions: high luminance (300 cd/m2), low luminance (10 cd/m2), and low luminance with short-term (15-minute) twilight adaptation (10 cd/m2).

RESULTS

The mean logarithm of minimum angle of resolution values of visual acuity were −0.09 ± 0.09, 0.10 ± 0.13, and 0.03 ± 0.09 at 300, 10, and 10 cd/m2 with twilight adaptation, respectively. Multiple regression analysis determined that spherical aberration (P

SIGNIFICANCE

Determining the anatomic location of insult in cases of concurrent bilateral upgaze palsy with bilateral ptosis can be challenging because of the various overlapping pathways and shared functions. It is more commonly related to bilater…

SIGNIFICANCE

This case series is the first to illustrate mixed infection from Pythium sp. and fungal species in corneal ulcer.

PURPOSE

This case series aimed to alert all toward the possibility of both Pythium sp. and fungal species infectio…

SIGNIFICANCE

Technology plays a crucial role in customizing scleral lenses and improving lens alignment, especially in challenging scleral shapes. In addition, remote fitting technology allows optometrists to extend their expertise globally, empowe…

SIGNIFICANCE

Systemic thromboembolic complications are well documented to be associated with coronavirus disease 2019 (COVID-19); however, there have been a growing number of reports regarding ocular complications stemming from COVID-19 vaccination…

SIGNIFICANCE

Spontaneous closure of an idiopathic full-thickness macular hole (FTMH) is a rare event. The underlying mechanisms are unclear because of the difficulty in detecting subtle structural changes even with serial imaging. Previous reports …

SIGNIFICANCE

The advancing age of the population will require increased access to eye care services to manage eye diseases and vision correction. Optometric education requires a sound financial plan to manage student debt. This study evaluates the financial inequalities of optometric programs in Canada and how this may impact the provision of eye care professionals.

PURPOSE

The objective of this study was to compare the financial inequities in optometric education in Canada from the 2020 graduating class.

METHODS

A cross-sectional study assessed monetary variables related to the study of optometry in Canada, including academic and personal expenses, and overall debt and expenses related to the COVID-19 lockdown for the 2020 graduating class.

RESULTS

A total of 108 optometry students from the 2020 graduating classes of the University of Montreal and the University of Waterloo responded, with 68 (female/male respondents, 53:15; mean [standard deviation] age, 25.66 [2.01] years) completing the study. Waterloo students spent more years in university (P

SIGNIFICANCE

Stakeholder engagement has been identified by national health organizations as a crucial step to successful translation of new health care treatments. In this clinical report, clinician-stakeholder feedback is presented for the magneti…

SIGNIFICANCE

Recently, novel refraction technology allows subjective refractions to be performed with a higher-resolution. It is unclear, however, if these benefits are noticed and appreciated by the patient during the examination and after dispens…

SIGNIFICANCE

Carotid disease contributes to 15 to 20% of all ischemic strokes, one of the leading causes of permanent disabilities and mortality globally. With its growing prevalence and the inflicted disability rates, screening for anomalies that …