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| ID | Type | Description | Link |
|---|---|---|---|
| PUTI Saintekes 2020 Grant | Other Identifier | Universitas Indonesia |
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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.
: Fresnel prisms with a power of 40∆ were fitted to the patient's spectacles for two weeks. Visual field parameters were analysed using the Humphrey Field Analyzer with the SITA 24-2 algorithm, while the Pelli-Robson and ETDRS charts were used to assess contrast sensitivity and visual acuity, respectively. After visual assessment, comfort was quantitatively assessed using a comfort scale.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Fresnel prism | Experimental | 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 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 |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Fresnel prism | Device | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| Visual Fied | Mean Deviation (dB) Pattern Standard deviation (dB) Visual field index (%) | 2 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| TPDK | Sharp vision with correction (log mar) | 2 weeks |
| Contrast sensitivity | Contrast sensitivity (log units) | 2 weeks |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Ophthalmology, Faculty of Medicine Universitas Indonesia Cipto Mangunkusumo Hospital, Indonesia | Jakarta | DKI Jakarta | 14430 | Indonesia |
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| Label | URL |
|---|---|
| Related Info | View source |
| ID | Type | URL | Comment |
|---|---|---|---|
| tri.rahayu01@ui.ac.id | Informed Consent Form | View IPD |
IPD will not be shared due to patient privacy considerations
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| ID | Term |
|---|---|
| D006423 | Hemianopsia |
| ID | Term |
|---|---|
| D014786 | Vision Disorders |
| D012678 | Sensation Disorders |
| D009461 | Neurologic Manifestations |
| D009422 | Nervous System Diseases |
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| D001766 |
| Blindness |
| D005128 | Eye Diseases |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |