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Medications Effect on Lenstar Measurements

NCT02780063 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 50

Last updated 2019-01-25

No results posted yet for this study

Summary

Prior to cataract surgery the lens must be calculated to appropriately fit a patient for the intraocular lens implant. Lenstar is an optical biometer that calculates the axial length, keratometry, lens thickness, pupillometry, and anterior chamber depth. Dilation drops are routinely used in eye exams in addition to pre-cataract surgery. The dilation drops include Tropicamide 1%, and Phenylephrine 2.5%. The Tropicamide achieves the dilation of the pupil which causes an anterior rotation of the ciliary body, which may affect the Lenstar measurements. This study is to determine if dilating medications affect the lens power prediction for emmetropia by the Lenstar biometer. Prior to dilation, Lenstar biometry will be performed on each eye. Patients will receive dilation medication and after waiting 20 minutes Lenstar biometry will be performed on each eye. Dilation and measurement with Lenstar will be done as standard of care. Measurements and calculations from before and after will be compared.

Conditions

  • Cataract

Interventions

OTHER

Lenstar Biometer

uses optical principles (laser interferometry) to measure axial length, measuring distance from the corneal apex to the retinal RPE. In addition to axial length, it also measures corneal thickness, anterior chamber depth, lens thickness, radii of curvature of flat and steep meridian, axis of flat meridian, white to white distance, and pupil diameter.

Sponsors & Collaborators

Principal Investigators

  • Ann Ostrovsky, MD · NYU Langone Health

Study Design

Allocation
NA
Purpose
SCREENING
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
50 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2015-09-18
Primary Completion
2018-07-24
Completion
2018-07-24

Countries

  • United States

Study Locations

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Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02780063 on ClinicalTrials.gov