Prevalence of Dyschromatopsia in Glaucoma Patients
试验速览
- 阶段
- 不适用
- 状态
- 撤回
- 试验地点
- 1
- 主要终点
- Result from Ishihara Test
研究概览
简要总结
Glaucoma is a progressive disease resulting in loss of retinal nerve cells and their axons (retinal nerve fibers). Retinal nerve fibers are ordered in a special manner when they enter the optic nerve. Hence, damage to the retinal nerve fibers by glaucoma results in visual field defects at certain locations. Furthermore, the retinal nerve fiber layers from different receptors for different colors are ordered in a special manner as well. Thus, it is possible that glaucomatous damage causes color vision dysfunction (dyschromatopsia).
At the moment there is disagreement whether dyschromatopsia occurs at early- to mid-stage or only in end-stage glaucoma.
By testing color vision in glaucoma patients the prevalence of dyschromatopsia in glaucoma and in different stages of the disease will be investigated.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
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
- •diagnosis of open angle glaucoma
- •visual acuity >/= 20/50
- •age >/= 18 (no upper limit)
- •male or female gender
排除标准
- •other type of glaucoma
- •other retinal disease (e.g. age related macular degeneration)
- •other disease affecting the optic nerve or the retinal nerve fibers
- •known color blindness
结局指标
主要结局
Result from Ishihara Test
时间窗: Visit 1
Color vision will be tested once by Ishihara plates. Both eyes will be tested separately.
次要结局
- Glaucoma stage(Visit 1)