Subjective Image Quality in Stereoscopic Image Modifications (Stereopsis)

Humans attain binocular vision from the two retinal images of both eyes through a series of sensory and motor processes that culminate in the perception of stereoscopic depth. Looking at a scene creates two slightly different images on the retinas which is due to the eyes' different positions on the head. This so called binocular disparity provides information to calculate depth and therefore enables stereopsis. Physiologically the two retinal images are superimposed and merge into one stereoscopic image.

If one image is presented to one eye in an experimental setting, and a completely different image is presented to the other eye, the investigators visual system, analogous to diplopic vision, is not able to fuse these image stimuli. Instead, a phenomenon called binocular rivalry occurs. Here, both images are seen alternating and the brain can switch back and forth between these images.

The aim of the present study is to investigate the effects of objective changes to image quality on the investigators subjective stereoscopic perception. This psychophysiological testing is done by looking at different images and thereafter by subjective grading of the image quality.

The investigators hypothesize that overlapping image modifications occurring in both eyes are detected immediately, but changes, that are rotated by 90 degrees against each other, should be suppressed and result in one stereoscopic image, reduced in image quality. Whether this also accounts for more detailed images, such as reading cards, is questionable.

Study Overview

• Status: Completed
• Conditions: Stereoscopic Vision

• Study Type: Observational
• Enrollment (Actual): 30

Contacts and Locations

Study Locations

• Austria
  • Vienna, Austria, 1090
    • Department of Clinical Pharmacology, Medical University of Vienna

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 16 years to 33 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

The participants will be selected by the Department of Clinical Pharmacology healthy subjects, male and female, 18-35 years

Description

Inclusion Criteria:

• Men and women aged between 18 and 35 years, nonsmokers
• Normal findings in the medical history and physical examination unless the investigator considers an abnormality to be clinically irrelevant
• Normal ophthalmic findings, emmetropia or ≤ 1 diopter

Exclusion Criteria:

• Regular use of medication, abuse of alcoholic beverages, participation in a clinical trial in the 3 weeks preceding the study
• Treatment in the previous 3 weeks with any drug (except oral contraceptives)
• Symptoms of a clinically relevant illness in the 3 weeks before the first study day

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

Collaborators and Investigators

• Sponsor: Medical University of Vienna

Study record dates

Study Major Dates

• Study Start: June 1, 2012
• Primary Completion (Actual): June 1, 2012
• Study Completion (Actual): June 1, 2012

Study Registration Dates

• First Submitted: June 18, 2012
• First Submitted That Met QC Criteria: June 19, 2012
• First Posted (Estimate): June 20, 2012

Study Record Updates

• Last Update Posted (Estimate): July 2, 2012
• Last Update Submitted That Met QC Criteria: June 28, 2012
• Last Verified: June 1, 2012

More Information

Terms related to this study

• Other Study ID Numbers: OPHT - 190312