Comparative Efficacy of Duochrome Test Verse +1 Blur Test in Detecting Refracting Error Across Different Ages
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 33
- 试验地点
- 1
- 主要终点
- Visual Function Index (VF-14) Questionnaire:
研究概览
简要总结
The comparative efficacy of the duochrome test versus +1 blur test in detecting refractive errors across different ages remains under-explored in current ophthalmic research. While the duochrome test is widely used to refine prescriptions, its standalone effectiveness compared to +1 blur test based refraction has not been thoroughly investigated.
详细描述
This study aims to evaluate the efficacy, accuracy, and reliability of the duochrome test in identifying refractive errors, including myopia and hyperopia across various ages. Refractive errors, including myopia, hyperopia, and astigmatism, are leading causes of visual impairment, requiring precise diagnostic tools. The duochrome test utilizes chromatic aberration to refine prescriptions, whereas the +1 blur test assesses spherical correction accuracy. Despite their clinical use, direct comparative studies remain limited. A total of 33 participants with estimated 10% dropout randomly assigned to undergo both tests. Groups will be based on different ages, Group A (18-35 years)and group B (36-60 years) ..both test (Duochrome test and +1 blur test) will apply on every patients.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Health Services Research
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 60 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age between 18 to 60 years old.
- •Both genders.
- •Those who have refractive error.
- •Patients with no history of prior eye surgery.
- •No active eye diseases affecting visual acuity, such as cataracts or retinal disorders.
- •Ability to cooperate with both the duochrome test and +1 blur test.
排除标准
- •Patients with severe visual impairment or neurological conditions affecting vision.
- •Patients with nystagmus or conditions that could interfere with reliable testing.
- •Age below 18 year and above 60 year excluded
- •Those patients who don't show their consent.
研究组 & 干预措施
duochrome test and +1 blur test (Group1) 18-35
干预措施: duochrome test and +1 blur test (Diagnostic Test)
duochrome test and +1 blur test (Group1) 36-60
干预措施: duochrome test and +1 blur test (Diagnostic Test)
结局指标
主要结局
Visual Function Index (VF-14) Questionnaire:
时间窗: 12 Months
Scores on all activities that the person performed or did not perform because of vision were then averaged, yielding a value from 0 to 4. This value was multiplied by 25, giving a final score from 0 to 100. A score of 100 indicates able to do all applicable activities score of 0 indicates unable to do all applicable activities because of vision
Visual Function Index (VF-14) Questionnaire:
时间窗: 12 Months
Scores on all activities that the person performed or did not perform because of vision were then averaged, yielding a value from 0 to 4. This value was multiplied by 25, giving a final score from 0 to 100. A score of 100 indicates able to do all applicable activities score of 0 indicates unable to do all applicable activities because of vision
+1 blur test
时间窗: 12 Months
Adding a +1.00 diopter (DS) lens to a patient's final refraction and measuring their distance visual acuity (VA). There are 4 questions with 5 different options ranging from 0-4. minimum score is 0 and maximum score is 16 with spherical correction.
Duochrome Test
时间窗: 12 Months
A duochrome test chart .There are 4 questions with 5 different options ranging from 0-4. minimum score is 0 and maximum score is 16 with spherical correction.
次要结局
未报告次要终点
研究者
Muhammad Naveed Babur
Principal Investigator
Superior University