Analysis of Defocus Curve of Pre-Presbyopic and Emerging Presbyopic Patients

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04474782

Enrollment

Registered

2020-07-17

Start date

2019-10-17

Completion date

2020-08-31

Last updated

2021-03-30

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

Conditions

Presbyopia

Brief summary

Educating patients on visual performance with presbyopic correcting intraocular lenses is crucial. Understanding the defocus curve of pre-presbyopic and emerging presbyopic crystalline lens will provide eye care provides useful information to better educate patients on visual performance expectations after cataract surgery with a presbyopic correcting intraocular lens. Our objective will be to assess the subjective range of clear vision of a pre-presbyopic and emerging presbyopic patient population utilizing a defocus curve. A comparison of the pre-presbyopic and emerging presbyopic defocus curve to all FDA-approved presbyopic intraocular lenses will be discussed in the manuscript.

Interventions

DIAGNOSTIC_TESTThere is not an intervention

There is not an intervention

Study design

Observational model

OTHER

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

37 Years to 48 Years

Inclusion criteria

1. Able and willing to provide written informed consent on the IRB approved Informed Consent Form 2. 37-48 years of age 3. Phakic

Exclusion criteria

1. Previous cataract surgery 2. Any pathology for which, in the investigator's judgement, could reduce the subjects BCVA 3. Subjects that are unable to obtain 20/20 BCVA (i.e. amblyopia, etc.)

Design outcomes

Primary

Measure	Time frame
Change in LogMar visual acuity during vision testing on ETDRS with loose lenses	Screening/enrollment visit

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026