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Validation of 3nethra Specto

Validation of 3nethra Specto with Subjective Refraction and Topcon Phoropter - NIL

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2025/03/083621
Enrollment
132
Registered
2025-03-28
Start date
Unknown
Completion date
Unknown
Last updated
2025-11-17

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

Conditions

Health Condition 1: H527- Unspecified disorder of refraction

Interventions

Control Intervention1: NIL: NIL

Sponsors

Sankara Academy of Vision
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: Participants who can understand and provide informed consent for participation in the study. Participants above 8 years old. All Genders are included. Participant is willing and able to follow all study procedures and requirements.

Exclusion criteria

Exclusion criteria: Patients with spherical power above +/-18.00D and cylindrical power above +/-6.00D Pregnant women is excluded Patient who is under medication known to significantly affect the vision Patient who is undergone eye surgery within 3 months before the participation in the study including LASIK or Lens replacement Patient who has eye pathologies like conjunctivitis, keratitis. herpes and eye injury

Design outcomes

Primary

MeasureTime frame
Difference between spherical, cylindrical measurements & axis alignment obtained by the 3nethra Specto and those obtained by subjective refraction using trial frame and Difference between spherical, cylindrical measurements & axis alignment obtained by the 3nethra Specto and those obtained by the Topcon Phoropter.Timepoint: In one visit at a time span of 1 hour

Secondary

MeasureTime frame
Repeatability (Precision) of Measurements: The consistency of spherical, cylindrical, and axis measurements obtained by the 3nethra Specto over two repeated tests. Time Efficiency: The time taken to complete the refraction process with the 3nethra Specto compared to the time taken using subjective refraction with a trial frame. Patient Comfort: Patient-reported comfort levels during the refraction process with the 3Nethra Specto, assessed using a standardized comfort questionnaire.Timepoint: In one visit at a time span of 1 hour

Countries

India

Contacts

Public ContactKaushik Murali

Sankara Eye Hospital

kaushik@sankaraeye.com9739000096

Outcome results

None listed

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