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Full-Text Articles in Medicine and Health Sciences
The Dominant Eye: Dominant For Parvo- But Not For Magno-Biased Stimuli?, Brian Foutch, Carl Bassi
The Dominant Eye: Dominant For Parvo- But Not For Magno-Biased Stimuli?, Brian Foutch, Carl Bassi
College of Optometry Faculty Works
Eye dominance is often defined as a preference for the visual input of one eye to the other. Implicit in this definition is the dominant eye has better visual function. Several studies have investigated the effect of visual direction or defocus on ocular dominance, but there is less evidence connecting ocular dominance and monocular visual thresholds. We used the classic “hole in card” method to determine the dominant eye for 28 adult observers (11 males and 17 females). We then compared contrast thresholds between the dominant and non-dominant eyes using grating stimuli biased to be processed more strongly either by …
Optometry Compensation Study: Narrowing Down The Unexplained Gender Wage Gap In Optometry, Rachel Simpson, Breanna Scott, Kate Hamm, Jackquelyn Tyra, Heather Jackson, Marie Fermil, Leslie Kinder, Carl Bassi
Optometry Compensation Study: Narrowing Down The Unexplained Gender Wage Gap In Optometry, Rachel Simpson, Breanna Scott, Kate Hamm, Jackquelyn Tyra, Heather Jackson, Marie Fermil, Leslie Kinder, Carl Bassi
College of Optometry Faculty Works
No abstract provided.
Is The Helmholtz–Kohlrausch Effect More Robust In Women?, Brian Foutch, Carl Bassi
Is The Helmholtz–Kohlrausch Effect More Robust In Women?, Brian Foutch, Carl Bassi
College of Optometry Faculty Works
No abstract provided.
Short-Wavelength Light-Blocking Eyeglasses Attenuate Symptoms Of Eye Fatigue, Carl Bassi, Jonathan Lin, Blair Gerratt, Rajendra Apte
Short-Wavelength Light-Blocking Eyeglasses Attenuate Symptoms Of Eye Fatigue, Carl Bassi, Jonathan Lin, Blair Gerratt, Rajendra Apte
College of Optometry Faculty Works
Purpose: The purpose of this study was to determine whether subjects who wear short wavelength–blocking eyeglasses during computer tasks exhibit less visual fatigue and report fewer symptoms of visual discomfort than subjects wearing eyeglasses with clear lenses.Methods: A total of 36 healthy subjects (20 male; 16 female) was randomized to wearing no-block, low-blocking, or high-blocking eyeglasses while performing a 2-hour computer task. A masked grader measured critical flicker fusion frequency (CFF) as a metric of eye fatigue and evaluated symptoms of eye strain with a 15-item questionnaire before and after computer use.Results: We found that the change in CFF after …
Influence Of Macular Pigment Optical Density Spatial Distribution On Intraocular Scatter, Christopher Putnam, Pauline Bland, Carl Bassi
Influence Of Macular Pigment Optical Density Spatial Distribution On Intraocular Scatter, Christopher Putnam, Pauline Bland, Carl Bassi
College of Optometry Faculty Works
No abstract provided.
Macular Pigment Spatial Distribution Effects On Glare Disability, Christopher Putnam, Carl Bassi
Macular Pigment Spatial Distribution Effects On Glare Disability, Christopher Putnam, Carl Bassi
College of Optometry Faculty Works
Purpose This project explored the relationship of the macular pigment optical density (MPOD) spatial profile with measures of glare disability (GD) across the macula. Results The cHFP identified reliable MPOD spatial distribution maps demonstrating a 1st-order exponential decay as a function of increasing eccentricity. There was a significant negative correlation between both measures of foveal MPOD and GD using 6cycles per degree (cpd) and 9cpd stimuli. Significant correlations were found between corresponding parafoveal MPOD measures and GD at 2 and 4° of eccentricity using 9cpd stimuli with greater MPOD associated with less glare disability. Conclusions These results are consistent with …
Near-Vision Acuity Levels And Performance On Neuropsychological Assessments Used In Occupational Therapy, Carl Bassi, Linda Hunt
Near-Vision Acuity Levels And Performance On Neuropsychological Assessments Used In Occupational Therapy, Carl Bassi, Linda Hunt
College of Optometry Faculty Works
We investigated how induced blur affects performance on the Trail Making Test and Digit Symbol Test routinely used in occupational therapy cognitive evaluations. The study used a factorial design with both age (young and old adults) and simulated blur levels of near visual acuity (20/50 and 20/100) manipulated between participants. A sample of 124 healthy, community-living adults was used in the final analysis. Significant differences (p < .05) were found in performance for young participants between 20/50 and 20/100 blur level as well as between 20/20 and 20/100 blur level for the Digit Symbol Test. Scores for old participants decreased as a function of blur but were not significant. This study illustrates that cognitive evaluations used throughout the lifespan may require the appropriate visual acuity level to maximize performance. Occupational therapists’ understanding of client factors and their effect on performance is fundamental to the client evaluation process.
Longitudinal Changes In Visual Acuity In Keratoconus, Edward Bennett, Larry Davis, Kenneth Schechtman, Brad Wilson, Carol Rosenstiel, Colleen Riley, David Libassi, Ralph Gundel, Louis Rosenberg, Mae Gordon, Karla Zadnik
Longitudinal Changes In Visual Acuity In Keratoconus, Edward Bennett, Larry Davis, Kenneth Schechtman, Brad Wilson, Carol Rosenstiel, Colleen Riley, David Libassi, Ralph Gundel, Louis Rosenberg, Mae Gordon, Karla Zadnik
College of Optometry Faculty Works
Purpose. The present investigation aimed to identify factors that predict reduced visual acuity in keratoconus from a prospective, longitudinal study.Methods. This report from the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study used 7 years of follow-up data from 953 CLEK subjects who did not have penetrating keratoplasty in either eye at baseline and who provided enough data to compute the slope of the change over time in high- or low-contrast best-corrected visual acuity (BCVA). Outcome measures included these slopes and whether the number of letters correctly read decreased by 10 letters or more in at least one eye in 7 …
Repeatability Of Corneal Topography Measurement In Keratoconus With The Tms-1, Larry Davis, Timothy Mcmahon, Robert Anderson, Cynthia Roberts, Ashraf Mahmoud, Loretta Szczotka-Flynn, Thomas Raasch, Nina Friedman
Repeatability Of Corneal Topography Measurement In Keratoconus With The Tms-1, Larry Davis, Timothy Mcmahon, Robert Anderson, Cynthia Roberts, Ashraf Mahmoud, Loretta Szczotka-Flynn, Thomas Raasch, Nina Friedman
College of Optometry Faculty Works
Purpose. The purpose of this study was to report the test–retest variability of simulated indices derived from the TMS-1 topography instrument (Tomey Technology, Waltham, MA) in keratoconus subjects enrolled in the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study. Methods. Four images were taken at an initial visit and at a repeat visit several weeks later. From these images, 17 indices were simulated from published formulas. Mixed-model analysis was used on test–retest data from the TMS-1 videokeratography instrument during the baseline year. This analysis yields estimates of within- and between-visit variability. Results. Repeatability analysis revealed that within-visit standard errors were 1.0 …