Repeatability of pupil diameter measurements using three different topography devices

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00029931

Enrollment

102

Registered

2022-08-04

Start date

2019-06-02

Completion date

Unknown

Last updated

2025-04-07

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

Conditions

H21.9

Interventions

Group 1: Determination of pupil diameter during the preoperative examination (pre-LASIK) using three different biometry devices: 1. Pentacam HR (Oculus Inc., Wetzlar, Germany). 2. IOLMaster 500 (Carl

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: All patients were older than 18 years All patients were able to sign an informed consent form

Exclusion criteria

Exclusion criteria: Patients with eye diseases Patients with previous eye surgery or trauma Patients with general diseases affecting the eye Patients who have worn contact lenses before the examination (soft contact lenses: 2 weeks, rigid contact lenses: 4 weeks)

Design outcomes

Primary

Measure	Time frame
Determination of the pupil diameter	—

Secondary

Measure	Time frame
Pupil diameter	—

Countries

Germany

Contacts

Public ContactAndreas Frings

Heinrich-Heine-Universität Düsseldorf

info@augenarzt-frings.de+49 911 235 558 25

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026