Development of a Validated Chart for Intermediate Vision Assessment

NCT02279446 | Unknown

• 1 other identifier: 263/13-10-2014
• Study Type: observational
• Target: 400
• Locations: 1 country
• Sites: 1

Brief Summary

Development of a validated computer-based instrument (software program) for the assessment of intermediate visual acuity.

Conditions

Myopia; Hyperopia; Presbyopia; Astigmatism

Outcome Measures

Primary Outcomes (1)

• Intermediate Visual Acuity (IVA)

  Number of participants that their intermediate visual acuity measured with the "intermediate visual acuity chart" will be statistically correlated with distant visual acuity (measured by 20/20 chart) and near visual acuity (measured by Jaeger chart)

  6 months

Study Arms (4)

20/20ND group

This group will have 20/20 visual acuity both in distant and near.

Other: Intermediate Visual acuity (IVA) assessment

20/20D group

This group will have 20/20 distant visual acuity and variable near visual acuity.

Other: Intermediate Visual acuity (IVA) assessment

20/20N group

This group will have 20/20 near visual acuity and variable distant visual acuity.

Other: Intermediate Visual acuity (IVA) assessment

s20/20ND group

This group will have variable near and distant visual acuity (both less than 20/20)

Other: Intermediate Visual acuity (IVA) assessment

Interventions

Intermediate Visual acuity (IVA) assessment OTHER

Intermediate visual acuity (IVA) will be assessed with the Intermediate Visual acuity chart which is similar to the prevalent Jaeger chart. It consists of short blocks of text in various type sizes.The computer screen is set at a specific reading distance (1 meter) and the patient is asked to read the passage with the smallest type he/she can see. According to the smallest text he/she can read, IVA is classified from IVA1 (which is considered the equivalent of 20/20 distance visual acuity) to IVA5

20/20D group; 20/20N group; 20/20ND group; s20/20ND group

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

Random

You may qualify if:

• native Greek participants or foreigners with perfect knowledge (verbal and written) of Greek language

You may not qualify if:

• glaucoma or suspicion for glaucoma,
• corneal disease or suspicion for corneal disease
• fundus disease or suspicion for fundus disease
• pregnancy or nursing,
• underlying autoimmune disease
• mental or neurologic disease

Sponsors & Collaborators

• Democritus University of Thrace: lead

Study Sites (1)

Eye Institute Of thrace

Alexandroupoli, Evros, 68100, Greece

RECRUITING

MeSH Terms

Conditions

Myopia; Hyperopia; Presbyopia; Astigmatism

Interventions

Restraint, Physical

Condition Hierarchy (Ancestors)

Refractive Errors; Eye Diseases

Intervention Hierarchy (Ancestors)

Behavior Control; Therapeutics; Immobilization; Investigative Techniques

Study Officials

• Georgios Labiris, MD, PhD

  Assistant Professor

  STUDY DIRECTOR

Central Study Contacts

Georgios Labiris, MD, PhD

CONTACT

00302551039891; labiris@usa.net

Study Design

• Study Type: observational
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Professor

Study Record Dates

• First Submitted: October 13, 2014
• First Posted: October 31, 2014
• Study Start: October 1, 2014
• Primary Completion: October 1, 2014
• Study Completion: April 1, 2015
• Last Updated: October 31, 2014

Record last verified: 2014-10

Locations

GR (1)