Comparison of Haptic Orientation in Negative Dysphotopsia

Not Applicable

Withdrawn

• Conditions: Negative Dysphotopsia

• Registration Number: NCT02724553
• Lead Sponsor: Loma Linda University

Brief Summary

Previous studies attempted to understand the dysphotopsia phenomenon by examining intraocular lens type, anterior capsule depth, iris-to-lens depth, lens refractive material, clear cornea incision wounds and anterior capsulorrhexis. However, there is limited literature in understanding haptic orientation and negative dysphotopsia; postulated theories and anecdotal reports relate to horizontal haptic orientation and the lateralization of rays such that light is received both in smaller width and anterior to the peripheral retina; however, no formal studies currently exist.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2016-02-26
• Study First Submitted QC: 2016-03-24
• Study First Posted: 2016-03-31
• Study Start: 2016-04
• Status Verified: 2016-11
• Primary Completion: 2016-11
• Study Completion: 2016-11
• Last Update Submitted: 2016-11-28
• Last Update Posted: 2016-11-30

Recruitment & Eligibility

• Status: WITHDRAWN
• Sex: All
• Target Recruitment: Not specified

Inclusion Criteria

Patients with bilateral cataracts that are visually significant meeting standard criteria for removal and select standard monofocal lens implantation.

Exclusion Criteria

Patients with any prior refractive surgery including prior cataract surgery, corneal ocular pathology, iris atrophy/damage, retinal or optic nerve pathology. Patients with history of peripheral vision loss. Patients selecting multifocal or toric lens implantation.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Presence of negative dysphotopsia after cataract surgery at 6 months	6 months	Presence of negative dysphotopsia in the vertical IOL placement compared to horizontal IOL placement

Secondary Outcome Measures

Name	Time	Method
Presence of negative dysphotopsia after cataract surgery at 1 week	1 week	Presence of negative dysphotopsia in the vertical IOL placement compared to horizontal IOL placement
Presence of negative dysphotopsia after cataract surgery at 1 month	1 month	Presence of negative dysphotopsia in the vertical IOL placement compared to horizontal IOL placement