Visual and Functional Assessment in Low Vision Patients

NCT01876147 | Completed

• 1 other identifier: OxfordVA2013
• Study Type: observational
• Target: 50
• Locations: 1 country
• Sites: 1

Brief Summary

Vision testing is a fundamental part of every optometry and ophthalmology assessment. Traditional vision testing charts are not able to measure vision below a certain level. Vision in this range is classified as counting fingers (CF), hand movements (HM) and light perception (LP). These measures are not very accurate or easily quantifiable. They are also poorly understood in terms of impact on quality of life. This study aims to assess new methods for measuring the vision of patients with very low vision.

Conditions

Retinitis Pigmentosa; Age-related Macular Degeneration; Optic Nerve Pathology; Inherited Retinal Dystrophies

Keywords

Low vision; Vision testing; Retinitis Pigmentosa; AMD; Visual acuity; Poor vision; Quantification

Outcome Measures

Primary Outcomes (1)

• Comparison of VA measured with FrACT and BRVT vision tests

  Single visit

Secondary Outcomes (1)

• Relationship between VA and ability to carry out daily living tasks.

  Single time point

Study Arms (2)

Order of vision tests 1

Undergo testing with BRVT first, FrACT second.

Order of vision tests 2

Undergo testing with FrACT first, BRVT second.

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Patients with low vision attending outpatient clinics in Oxford Eye Hospital.

You may qualify if:

• Snellen VA or equivalent ≤ 6/60 in both eyes
• Patient has capacity to give consent and to undertake vision tests

You may not qualify if:

• Diagnosis of functional vision loss
• Unwilling and/or unable to sign informed consent and complete the vision tests

Sponsors & Collaborators

• University of Oxford: lead

Study Sites (1)

Oxford University Hospitals NHS Trust

Oxford, Oxfordshire, OX3 9DU, United Kingdom

Location

Related Publications (1)

• Jolly JK, Gray JM, Salvetti AP, Han RC, MacLaren RE. A Randomized Crossover Study to Assess the Usability of Two New Vision Tests in Patients with Low Vision. Optom Vis Sci. 2019 Jun;96(6):443-452. doi: 10.1097/OPX.0000000000001380.

  PMID: 31058709 RESULT

Related Links

• Related Info

MeSH Terms

Conditions

Retinitis Pigmentosa; Macular Degeneration; Vision, Low; Vision Disorders

Condition Hierarchy (Ancestors)

Eye Diseases, Hereditary; Eye Diseases; Retinal Dystrophies; Retinal Degeneration; Retinal Diseases; Genetic Diseases, Inborn; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Sensation Disorders; Neurologic Manifestations; Nervous System Diseases; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Officials

• Robert E MacLaren, DPhil

  University of Oxford

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: CASE CROSSOVER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: June 10, 2013
• First Posted: June 12, 2013
• Study Start: August 1, 2013
• Primary Completion: March 1, 2016
• Study Completion: March 1, 2016
• Last Updated: June 13, 2019

Record last verified: 2018-10

Locations

GB (1)