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Portable Autorefractor- InstaRef R20

Validation of a hand-held, Portable autorefractor (InstaRef R20)

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2021/11/037869
Enrollment
132
Registered
2021-11-08
Start date
Unknown
Completion date
Unknown
Last updated
2022-10-17

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

Conditions

None listed

Interventions

None listed

Sponsors

Diwakar Rao
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: Subjects with BCVA 20/20 in each eye. Subjects with refractive errors between Sph+/-10D, Cyl +/-5D.

Exclusion criteria

Exclusion criteria: Subjects with significant media opacity- corneal opacity, advanced cataract, vitreous hemorrhage. posterior segment pathology affecting visual acuity, amblyopia and inability to fixate, active eye infection, inflammation.

Design outcomes

Primary

MeasureTime frame
Demonstrate the performance of InstaRef R20 when compared against subjective refraction (gold standard). Timepoint: At the end of the study—

Secondary

MeasureTime frame
Demonstrate the substantial equivalence in terms of performance and safety of a InstaRef R20 in measuring refractive errors when compared against a Open field AR, Plusoptic, Quicksee and standard tabletop autorefractor Topcon ARK 800. Timepoint: At the end of the trail—

Countries

India

Contacts

Public ContactDiwakar Rao

Sankara College of optometry

dot_diwakar@yahoo.co.in9972015862

Outcome results

None listed

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