Change of Retinally-Induced Aniseikonia in Patients With Epiretinal Membrane After Vitrectomy

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01901406

Enrollment

Registered

2013-07-17

Start date

2013-07-31

Completion date

2014-06-30

Last updated

2014-08-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Epiretinal Membranectomy

Keywords

epiretinal membrane, stereopsis, aniseikonia

Brief summary

Epiretinal membrane is common disease, affecting 5\ 10 % incidence over 60 years old population. It reduce visual acuity, cause metamorphopsia. In the past, vitrectomy and epiretinal membranectomy was indicated in patients with visual acuity less than 20/40, but nowadays with technical improvement and surgical instrument renovation, it seems to have been changed the surgical indication. Therefore, we plan to evaluate the changes of binocular visual acuity, aniseikonia in patients with epiretinal membrane.

Interventions

None listed

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

20 Years to 90 Years

Healthy volunteers

Inclusion criteria

* Idiopathic epiretinal membrane who had impaired vision or metamorphopsia, want to undergo vitrectomy * Age more than 20 years and less than 90 years old

Exclusion criteria

* secondary epiretinal membrane due to retinal surgery, * impaired visual acuity less than 20/40 in the normal eye(Snellen chart) due to severe cataract * glaucoma patients * complication during vitrectomy (ex. Retinal tear, silicone oil injection, …) * other retinal disease except epiretinal membrane * other ocular surgery history within 3 months * intellectual problems or illiterate whom could not obtained informed consent

Design outcomes

Primary

Measure	Time frame	Description
Changes of Stereopsis tested by TNO test (arc of second)	from Initial screening day before surgey to postoperative 6 months	Stereopsis is normal binocular vision. Its presence or absence is an important indicator of the state of binocularity. The TNO test is graded to provide retinal disparities ranging from 15 to 480 second of arc.
Titmus test (arc of second)	from Initial screening day before surgey to postoperative 6 months	—

Countries

South Korea

Outcome results