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Fresnel Prism in Low Vision Patients With Homonymous Hemianopia Defect in Cipto Mangunkusumo Hospital

NCT07531667 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 25

Last updated 2026-04-15

No results posted yet for this study

Summary

Background: Homonymous hemianopia is a visual field defect that causes functional disabilities, such as decreased self-confidence, limited mobility, and increased risk of falls. Studies related to the effectiveness and comfort of Fresnel prisms, especially in the Indonesian population are limited.

Objective: To evaluate the effectiveness and comfort level of Fresnel prisms in expanding visual field in an Indonesian patient population with homonymous hemianopia.

Conditions

  • Fresnel Prism

Interventions

DEVICE

Fresnel prism

The Fresnel prism chosen was of 40∆ power (the largest size available) with the aim of the largest visual field expansion, which was 20 degrees that the patient felt during environmental orientation and mobilisation. Fresnel prism fitting was performed using the patient's spectacles (if wearing spectacles) or plano glasses provided by the researcher. The patient was given object movement stimulation to identify the visual field boundary and the Fresnel prism was placed 2 mm away from the healthy visual field area. The Fresnel prism was placed on the inner side of the lens. Vertical correction was performed in homonymous hemianopia depending on the visual field defect. The patient was then asked to practice scanning before being asked to wear the Fresnel prism for 5.5 hours daily for two weeks. Patients were given a wear sheet to evaluate the duration of wear in a day.

Sponsors & Collaborators

  • Indonesia University

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2022-05-01
Primary Completion
2022-07-01
Completion
2022-08-01

Countries

  • Indonesia

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07531667 on ClinicalTrials.gov