The long-term function of this research program is to relate visual deficits to the underlying cellular pathophysiology of disease processes, with the current focus exclusively on glaucoma. The proposed research applies a quantitative cortical neural pooling model to analysis of perimetric damage produced by glaucoma, with the goals of reducing perimetric variability and improving relations between clinical measures of glaucomatous damage. There are three Specific Aims:
Specific Aim 1) To optimize contrast sensitivity perimetry (CSP) for clinical use in patients with glaucoma, using a quantitative neural model for perimetry. Our neural model will be used to optimize CSP parameters and algorithms in terms of four factors: screening (identify defects), test-retest (identify progression), characterization (identify pattern of damage), and relations with structural measures.
Specific Aim 2) To analyze relations between conventional automated perimetry (CAP) and imaging measures in data from the United Kingdom Glaucoma Treatment Study (UKGTS), using a quantitative neural model. A large prospective longitudinal dataset will be analyzed in terms of model predictions relating perimetric sensitivity with results from four different imaging tests.
Specific Aim 3) To assess long-term fluctuation versus progression within and between perimetric and structural measures of glaucomatous damage, using a quantitative neural model for perimetry. A prospective longitudinal study will be conducted to test predictions of the model concerning relations between CSP and standard clinical measures, both perimetric and imaging.

Public Health Relevance

Perimetry measures visual function across the visual field, and is used routinely for diagnosing and following patients with glaucoma, one of the leading causes of blindness in the US and globally. The proposed research will produce a deeper scientific understanding of perimetry, and will lead to improved methods for using perimetry in clinical studies, treatment trials and care of individual patients. The potential public health benefit is substantial, given the large number of patients with glaucoma.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
Research Project (R01)
Project #
5R01EY007716-22
Application #
8374410
Study Section
Biology and Diseases of the Posterior Eye Study Section (BDPE)
Program Officer
Chin, Hemin R
Project Start
1999-03-01
Project End
2014-11-30
Budget Start
2012-12-01
Budget End
2014-11-30
Support Year
22
Fiscal Year
2013
Total Cost
$491,941
Indirect Cost
$115,845
Name
Indiana University Bloomington
Department
Type
Schools of Optometry/Ophthalmol
DUNS #
006046700
City
Bloomington
State
IN
Country
United States
Zip Code
47401
Swanson, William H; Dul, Mitchell W; Horner, Douglas G et al. (2016) Individual differences in the shape of the nasal visual field. Vision Res :
Swanson, William H; Dul, Mitchell W; Horner, Douglas G et al. (2016) Contrast sensitivity perimetry data from adults free of eye disease. Data Brief 8:654-8
Gardiner, Stuart K; Swanson, William H; Demirel, Shaban (2016) The Effect of Limiting the Range of Perimetric Sensitivities on Pointwise Assessment of Visual Field Progression in Glaucoma. Invest Ophthalmol Vis Sci 57:288-94
Ashimatey, Bright S; Swanson, William H (2016) Between-Subject Variability in Healthy Eyes as a Primary Source of Structural-Functional Discordance in Patients With Glaucoma. Invest Ophthalmol Vis Sci 57:502-7
Dul, Mitchell; Ennis, Robert; Radner, Shira et al. (2015) Retinal adaptation abnormalities in primary open-angle glaucoma. Invest Ophthalmol Vis Sci 56:1329-34
Swanson, William H; Horner, Douglas G (2015) Assessing assumptions of a combined structure-function index. Ophthalmic Physiol Opt 35:186-93
Gardiner, Stuart K; Demirel, Shaban; Goren, Deborah et al. (2015) The Effect of Stimulus Size on the Reliable Stimulus Range of Perimetry. Transl Vis Sci Technol 4:10
Huang, Gang; Luo, Ting; Gast, Thomas J et al. (2015) Imaging Glaucomatous Damage Across the Temporal Raphe. Invest Ophthalmol Vis Sci 56:3496-504
Swanson, William H; Malinovsky, Victor E; Dul, Mitchell W et al. (2014) Contrast sensitivity perimetry and clinical measures of glaucomatous damage. Optom Vis Sci 91:1302-11
Swanson, William H; Horner, Douglas G; Dul, Mitchell W et al. (2014) Choice of Stimulus Range and Size Can Reduce Test-Retest Variability in Glaucomatous Visual Field Defects. Transl Vis Sci Technol 3:6

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