NCT03735602

Neural Mechanisms Underlying Astigmatism

The Research of the Neural Mechanisms Underlying Astigmatism

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 20 (estimated)
• Sponsor: Zhongshan Ophthalmic Center, Sun Yat-sen University · Academic / Other
• Sex: All
• Age: 10 Years – 16 Years
• Healthy volunteers: Accepted

Summary

This study is to compare the contrast sensitivity function and neural response to gratings before and after the orientation discrimination task in the astigmatism or amblyopia patients.

Detailed description

The presence of astigmatism can lead to substantial reductions in visual performance in a variety of clinical vision measures and functional visual tasks. However, the neural mechanisms underlying the astigmatism remains unknown. The current study recruited three groups (patients with with-the-rule astigmatism and amblyopia, patients with with-the-rule astigmatism but without amblyopia, normal controls) of subjects and patients receive perceptual learning training (orientation discrimination task) which lasts for around 15 days. This main aim is to compare the contrast sensitivity function and neural response to gratings before and after the orientation discrimination task in the astigmatism or amblyopia patients. Patients with astigmatism or amblyopia were included in this study. All participants underwent an ophthalmic examination that included slit-lamp biomicroscopy, visual acuity, quick CSF under full optical correction, 9-SF life quality questionnaire and fundus examination.

Conditions

• Astigmatism

Interventions

Type	Name	Description
BEHAVIORAL	perceptual training	orientation discrimination task

Timeline

• Start date: 2019-07-01
• Primary completion: 2021-03-01
• Completion: 2021-12-01
• First posted: 2018-11-08
• Last updated: 2020-05-19

Locations

1 site across 1 country: China