Contrast Sensitivity and Diabetic Macular Edema
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 132
- 试验地点
- 1
- 主要终点
- Contrast Sensitivity
研究概览
简要总结
Contrast sensitivity is a tool use to evaluate the visual function in all patients. It can be modified by different pathologies or by age. The purpose of this study is to identify the changes that could be in relationship with the course of diabetic retinopathy comparing with diabetic patient without retinopathy and in patients with diabetic macular edema so if it is a difference, research for therapeutic strategies to improve it in this patients.
详细描述
Contrast sensitivity is defined as a subjective measurement, it is the ability to separate the image between figure and background, taking into account the minimum amount of light required; it is evaluated by the contrast threshold, which is the smallest amount of contrast needed to be able to see a target and solve their characteristics, would be his reciprocal value. Medina et al. curve reported in healthy Mexicans SC 5 to 80, where > 51 years have decreased compared to contrast sensitivity studies international; further that contrast sensitivity in older groups of 41 years is decreased high frequency.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 40 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •DIABETIC PATIENTS
- •40-60 YEARS OLD
- •ANY GENDER
- •VISUAL ACUITY >0.25 IN DECIMAL EQUIVALENT,
排除标准
- •PATIENTS WITH CATARACTS OR OTHER MACULOPATHY
- •PATIENTS WITH CONTACT LENSES
- •PATIENTS WITH REFRACTIVE ERROR >6.00DP
- •PATIENTS WITH PREVIOUS OCULAR SURGERY
结局指标
主要结局
Contrast Sensitivity
时间窗: up to 8 months
Diabetic patients who are attended at Ophthalmology service in a general hospital undergo to contrast sensitivity test evaluating all frequency by software with 5 spacial frequency (1.5, 3, 6, 12 and 18 cycle grade, Stereoptical Co 1996) in the Visual Basic program.
次要结局
未报告次要终点
研究者
Dulce Milagros Razo Blanco Hernández
MEDICAL RESEARCHER
Hospital Juarez de Mexico