scholarly journals Simulated central vision loss does not impair implicit location probability learning when participants search through simple displays

2021 ◽  
Author(s):  
Douglas A. Addleman ◽  
Vanessa G. Lee
Keyword(s):  
Vision Loss ◽  
Probability Learning ◽  
Central Vision ◽  
Central Vision Loss

scholarly journals Simulated central vision loss impairs implicit location probability learning

2020 ◽  
Author(s):  
Douglas A Addleman ◽  
Gordon E Legge ◽  
Yuhong Jiang
Keyword(s):  
Vision Loss ◽  
Target Location ◽  
Probability Learning ◽  
Age Related Macular Degeneration ◽  
Oculomotor Control ◽  
Central Scotoma ◽  
Central Vision ◽  
Central Vision Loss ◽  
Age Related ◽  
High Acuity

Central vision loss (CVL) occurs in advanced forms of age-related macular degeneration (AMD). It impairs high-acuity vision and results in difficulties with oculomotor control. Goal-driven guidance of attention is less effective in people with CVL, but do central scotomas also affect implicit, experience-driven attention? We investigated how simulated central scotomas affect young adults’ ability to prioritize locations that frequently contain a visual search target (location probability learning). Experiment 1 successfully induced probability learning in a no scotoma phase, regardless of whether participants became aware of the target’s location probability. Subsequently, central scotomas were introduced using a gaze-contingent eye tracking paradigm. The previously learned spatial bias persisted for a short time in this phase, an effect that was statistically comparable for no-scotoma and scotoma testing. Experiment 2 investigated whether participants could acquire location probability learning when trained with a simulated central scotoma. Unlike Experiment 1, training with a central scotoma yielded location probability learning only in participants who were aware of the target’s location probability. This effect transferred to search with no scotoma in aware but not unaware participants. Together, the results show that simulated central vision loss interferes with the acquisition of implicitly learned location probability learning, supporting a role of central vision in implicit spatial attentional biases.

scholarly journals Simulated central vision loss impairs implicit location probability learning

Cortex ◽  
2021 ◽  
Vol 138 ◽  
pp. 241-252
Author(s):  
Douglas A. Addleman ◽  
Gordon E. Legge ◽  
Yuhong V. Jiang
Keyword(s):  
Vision Loss ◽  
Probability Learning ◽  
Central Vision ◽  
Central Vision Loss

scholarly journals Simulated central vision loss does not impair implicit location probability learning when participants search through simple displays

2021 ◽  
Author(s):  
Douglas A Addleman ◽  
Vanessa G. Lee
Keyword(s):  
Visual Search ◽  
Spatial Attention ◽  
Vision Loss ◽  
Target Location ◽  
Response Times ◽  
Probability Learning ◽  
Search Display ◽  
Natural Scenes ◽  
Central Vision ◽  
Central Vision Loss

Central vision loss disrupts voluntary shifts of spatial attention during visual search. Recently, we reported that a simulated scotoma impaired implicit spatial attention towards regions likely to contain search targets. In that task, search items were overlaid on natural scenes. Because natural scenes can induce explicit awareness of learned biases leading to voluntary shifts of attention, here we used a search display with a blank background less likely to induce awareness of target location probabilities. Participants searched both with and without a simulated central scotoma: a training phase contained targets more often in one screen quadrant and a testing phase contained targets equally often in all quadrants. In Experiment 1, training used no scotoma, while testing alternated between blocks of scotoma and no-scotoma search. Experiment 2 training included the scotoma and testing again alternated between scotoma and no-scotoma search. Response times and saccadic behaviors in both experiments showed attentional biases towards the high-probability target quadrant during scotoma and no-scotoma search. Whereas simulated central vision loss impairs implicitly learned spatial attention in the context of natural scenes, our results show that this may not arise from impairments to the basic mechanisms of attentional learning indexed by visual search tasks without scenes.

scholarly journals Driving Habits in Older Patients with Central Vision Loss

Ophthalmology ◽  
2014 ◽  
Vol 121 (3) ◽  
pp. 727-732 ◽  
Author(s):  
Sabyasachi Sengupta ◽  
Suzanne W. van Landingham ◽  
Sharon D. Solomon ◽  
Diana V. Do ◽  
David S. Friedman ◽  
...  
Keyword(s):  
Older Patients ◽  
Vision Loss ◽  
Central Vision ◽  
Central Vision Loss

scholarly journals Bilateral juxtapapillary choroidal neovascularization secondary to Birdshot chorioretinopathy -- case report

2021 ◽  
Author(s):  
Sania Vidas Pauk ◽  
Nenad Vukojević ◽  
Sonja Jandroković ◽  
Miro Kalauz ◽  
Martina Tomić ◽  
...  
Keyword(s):  
Case Report ◽  
Macular Edema ◽  
Choroidal Neovascularization ◽  
High Myopia ◽  
Vision Loss ◽  
Detailed Examination ◽  
Central Vision ◽  
Birdshot Chorioretinopathy ◽  
Central Vision Loss ◽  
The Right

Central vision loss, photopsia, floaters and macular edema in a highly myopic patient can easily be misrelated to high myopia complications. However, in atypical cases, detailed examination along with a thorough diagnostic is required to establish the right diagnosis, which is often beyond the limits of the condition originally considered.

High rate of conversion from ocular hypertension to glaucoma in subjects with uveitis

2021 ◽  
pp. bjophthalmol-2021-318809
Author(s):  
Tiffany Ma ◽  
Joanne L Sims ◽  
Sonya Bennett ◽  
Shenton Chew ◽  
Rachael L Niederer
Keyword(s):  
Ocular Hypertension ◽  
Vision Loss ◽  
Glaucoma Surgery ◽  
High Rate ◽  
Rapid Progression ◽  
Central Vision ◽  
Uveitic Glaucoma ◽  
Central Vision Loss

AimsTo examine presentation, management and long-term sequelae of ocular hypertension and uveitic glaucoma.MethodsRetrospective observational study of all subjects with uveitic glaucoma or ocular hypertension seen in Auckland uveitis clinics over the last 10 years.ResultsA total of 188 eyes of 139 subjects with uveitic glaucoma or ocular hypertension were included for analysis. Total follow-up was 1854.5 eye years (mean 9.9 years). The mean age at uveitis diagnosis was 49.3 years. 52.5% of subjects were male. The most common diagnoses were idiopathic uveitis (29.3%), sarcoidosis (13.3%), herpes zoster (6.9%), HLA-B27 uveitis (6.9%), tuberculosis (5.9%) and Posner-Schlossmann or cytomegalovirus (CMV) uveitis (5.3%). Median intraocular pressure (IOP) at diagnosis was 35 mm Hg (IQR 29–45). 144 eyes (77.0%) developed glaucoma during the follow-up period, of whom 41 lost some central vision due to glaucoma. Oral acetazolamide was required for IOP control in 64.5%, 50 eyes underwent trabeculectomy, 18 eyes required a tube and 6 underwent minimally invasive glaucoma surgery.ConclusionRapid progression was observed from ocular hypertension to uveitic glaucoma. Uveitic glaucoma is aggressive, with high likelihood of requiring surgical management and high risk of central vision loss. Close collaboration between uveitis and glaucoma specialists is required to maximise outcomes for these patients.

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