To compare two Intraocular lens power calculation formulae in order to get the accurate refractive status after cataract surgery

Predicting the refractive outcome after cataract surgery â?? A comparison between SRK/T vs Haigis formula

Status

Active, not recruiting

Phases

Phase 3

Study type

Interventional

Source

CTRI

Registry ID

CTRI/2018/11/016331

Enrollment

Registered

2018-11-14

Start date

Unknown

Completion date

Unknown

Last updated

2021-11-24

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

Conditions

Health Condition 1: H25- Age-related cataract

Interventions

Intervention1: Haigis formula: Patients IOL calculated using this formula Control Intervention1: SRK/T formula: Patients IOL calculated using this formula

Eligibility

Inclusion criteria

Inclusion criteria: a) Patients above the age 50 years b) Existence of age-related cataract c) No previous surgery of anterior or posterior segment

Exclusion criteria

Exclusion criteria: a) Non-correctable retinal or corneal problem b) Other eye pathologies except cataract c) Patient with psychiatric illness, traumatic cataract, corneal degenerations, squint, high corneal astigmatism (more than 2.5D)

Design outcomes

Primary

Measure	Time frame
To compare the refractive status after cataract surgery between SRK/T vs Haigis formula calculated preoperatively using IOL master.Timepoint: The refractive status after surgery will be checked at 5th/6th week post surgery	—

Secondary

Measure	Time frame
To study the effect of anterior chamber depth on the predictive accuracy of Haigis formula Timepoint: preoperative ACD, post op refractive error at 6 weeks;To study the effect of axial length on the predictive accuracy of SRK/T and Haigis formulaTimepoint: at 6 weeks post operatively	—

Countries

India

Contacts

Public ContactSwetha Ravichandran

Christian Medical College

andrew@cmcvellore.ac.in9994068101

Outcome results

None listed

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