A New Measurement of Anseikonia Tolerance

Glostrup University Hospital, Copenhagen

Status: Unknown

Conditions: Aniseikonia; Anisometropia and Aniseikonia

Treatments: Diagnostic Test: Measurement of aniseikonia tolerance

Study type: Observational

Funder types: Other

Identifiers

NCT03832335

04127

Details and patient eligibility

About

Population 1:

Measure the effect of size glasses from1-9% on stereopsis

Population 2:

Measure the effect of size glasses from 1-9% on stereopsis in two settings:

• before and after cataract surgery
• after dilation of the eye

Full description

Population 1:

21 eye healthy phakic individuals. Measurements: baseline stereopsis and stereopsis after size glass (1-9%) is added in front of the right eye and in front og the left eye. This measurement provides details on how much size difference a person can endure without impairing stereopsis.

Population 2:

11 phakic eye healthy individuals awaiting cataract operation on both eyes. Measurements are the same as population 1 but this study group is also measured after dilating the eyes. This is to see if accommodation affects the measurement. A postoperative measurement six weeks after cataract operation is also performed to examine if cataract operation affects the measurement.

Enrollment: 31 estimated patients

Sex: All

Ages: 60 to 95 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• No previous eye history
• cataract grade <= 1
• visual acuity above 0.8

Exclusion criteria

• lack of cooperation
• amblyopia
• axial anisometropia
• ametropia

Trial design

31 participants in 2 patient groups

Phakic group

Description:

21 eyehealthy individuals examined for baseline stereopsis and impact of aniseikonia on stereopsis. An non-invasive measurement.

Treatment:

Diagnostic Test: Measurement of aniseikonia tolerance

Cataract group

Description:

11 patients awaiting cataract surgery on both eyes. Measurement of baseline stereopsis and impact of artificial induced aniseikonia on stereopsis. A non invasive measurement that are repeated after dilatation of the eyes and again six weeks after surgery.

Treatment:

Diagnostic Test: Measurement of aniseikonia tolerance