Use of Fresnel Prism in Low Vision Patients With Homonymous Hemianopia Defect in Cipto Mangunkusumo Hospital
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 25
- 试验地点
- 1
- 主要终点
- Visual Fied
研究概览
简要总结
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.
详细描述
: 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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •subjects with a diagnosis of partial or complete homonymous hemianopia based on the results of the Humphrey perimetry examination;
- •age 18 years or older;
- •corrected visual acuity of 6/18 or better; and
- •willing to give consent for this study and consistently follow the rehabilitation process.
排除标准
- •ocular motility disorders; the primary position of the eyeball was not orthophoric; and
- •walking disorders that resulted in poor fixation of glasses.
研究组 & 干预措施
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 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
干预措施: Fresnel prism (Device)
结局指标
主要结局
Visual Fied
时间窗: 2 weeks
Mean Deviation (dB) Pattern Standard deviation (dB) Visual field index (%)
次要结局
- TPDK(2 weeks)
- Contrast sensitivity(2 weeks)
研究者
dr. Tri Rahayu, SpM(K), FIACLE
MD
Indonesia University