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Medications Effect on Lenstar Measurements

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NYU Langone Health

Status

Completed

Conditions

Cataract

Treatments

Other: Lenstar Biometer

Study type

Interventional

Funder types

Other

Identifiers

NCT02780063
15-00908

Details and patient eligibility

About

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.

Enrollment

50 patients

Sex

All

Ages

50+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Candidates for cataract surgery undergoing routine evaluation of cataracts.

Exclusion criteria

  • Patients that have had their cataracts removed
  • Patients that cannot undergo routine evaluation for cataract surgery (because they are too ill to sit upright in a chair)

Trial design

Primary purpose

Screening

Allocation

N/A

Interventional model

Single Group Assignment

Masking

None (Open label)

50 participants in 1 patient group

Lenstar Biometry
Experimental group
Description:
Lenstar biometry will be performed on each eye prior to dilation. Subjects eyes will be dilated and subject will wait 20 minutes. Lenstar biometry will be performed after the 20 wait time.
Treatment:
Other: Lenstar Biometer

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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