The Effect of Pupillary Dilation on Haigis Formula Calculated IOL Power Measurement by Using IOL Master

Status

Active, not recruiting

Phases

Phase 1

Study type

Observational

Source

TCTR

Registry ID

TCTR20150610001

Enrollment

373

Registered

2015-06-10

Start date

2013-02-01

Completion date

Unknown

Last updated

2026-03-30

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

Conditions

Healthy subjects IOL calculation Haigis IOL master Pupillary dilation IOL

Interventions

Biometric measurement from IOL Master

Diagnostic

IOL master

Eligibility

Sex/Gender

All

Age

20 Years to 90 Years

Inclusion criteria

Inclusion criteria: the healthy volunteered subjects age over 20 years old either with or without cataract.

Exclusion criteria

Exclusion criteria: -the subjects who has been used topical or systemic medication that has the effect of pupillary dilation - previously undergone intraocular surgery -angle closure suspected (examined under Sussman Four-Mirror Gonioscope) -lens opacity that too opaque to be measured using the IOL Master -history of mydriatic drug allergy -history of contact lens wear -inability to do ocular fixation and maintain in an upright position.

Design outcomes

Primary

Measure	Time frame
the Haigis calculated intraocular lens (IOL) power by using the IOLMasterÂ® on each visit day IOL master,Ocular biometry on each visit IOL master	—

Secondary

Measure	Time frame
Axial length on each visit IOL master	—

Countries

Thailand

Contacts

Public ContactBharkbhum Khambhiphant

Department of Ophthalmology, King Chulalongkorn Memorial Hospital, Thai Red Cross Society

bharkbhum@gmail.com66898111573

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Apr 4, 2026