Evaluation of Visual Acuity With a Reusable Toric Multifocal Contact Lens
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 75
- 试验地点
- 9
- 主要终点
- Binocular High Luminance High Contrast logMAR Visual Acuity
研究概览
简要总结
The study is a bilateral, single-masked, single-arm, 4-visit dispensing study evaluating the visual performance of the study lenses.
详细描述
The study is a bilateral, single-masked, single-arm, 4-visit dispensing study evaluating the visual performance of the study lenses.
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
盲法说明
Subjects will be unaware of the identity of the investigational product to help reduce potential bias
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
- 是
入选标准
- •Potential subjects must satisfy all of the following criteria to be enrolled in the study:
- •Read, understand, and sign the STATEMENT OF INFORMED CONSENT and receive a fully executed copy of the form.
- •Appear able and willing to adhere to the instructions set forth in this clinical protocol.
- •Be at least 40 and not more than 70 years of age at the time of screening.
- •Own a wearable pair of spectacles if required for their distance vision.
- •Be an adapted soft contact lens wearer in both eyes (i.e. has worn lenses a minimum of 2 days per week for at least 8 hours per wear day, for the past month).
- •Be an existing wearer of a presbyopic contact lens correction (e.g., reading spectacles over contact lenses, multifocal or monovision contact lenses, etc.) or respond positively to at least one symptom on the "Presbyopic Symptoms Questionnaire".
- •Have distance spherical component of refraction in the range of either -1.25 D to -3.75 D or +1.25 to +3.75 D in each eye.
- •Have refractive cylinder in the range of -0.75 D to -1.75 D in each eye, with their cylinder axis 90°±25°.
- •Have near ADD power requirement in the range of +0.75 D to +2.50 D in each eye.
- •Have best corrected distance visual acuity of 20/20-3 or better in each eye.
排除标准
- •The subject must not:
- •Be currently pregnant or lactating.
- •Have any active or ongoing ocular or systemic allergies that may interfere with contact lens wear.
- •Have any active or ongoing systemic disease, autoimmune disease, or use of medication, which may interfere with contact lens wear. This may include, but not be limited to, diabetes, hyperthyroidism, Sjögren's syndrome, xerophthalmia, acne rosacea, Stevens- Johnson syndrome, and immunosuppressive diseases or any infectious diseases (e.g. hepatitis, tuberculosis).
- •Use systemic medications that may interfere with contact lens wear or cause blurred vision. See section 9.1 for additional details regarding excluded systemic medications.
- •Currently use ocular medication with the exception of rewetting drops.
- •Have any known hypersensitivity or allergic reaction to single use preservative free rewetting drops, sodium fluorescein, or Biotrue® multipurpose solution.
- •Have any previous, or planned, ocular or intraocular surgery (e.g. radial keratotomy, PRK, LASIK, lid procedures, cataract surgery, retinal surgery, etc.).
- •Have a history of amblyopia or strabismus.
- •Have a history of herpetic keratitis.
- •Have a history of irregular cornea.
- •Have a history of pathological dry eye.
- •Have participated in any contact lens or lens care product clinical trial within 14 days prior to study enrollment.
- •Be an employee or immediate family member of an employee of clinical site (e.g., Investigator, Coordinator, Technician).
- •Have clinically significant (Grade 2 or greater) corneal edema, corneal vascularization, corneal staining, tarsal abnormalities or bulbar injection, or any other corneal or ocular abnormalities which would contraindicate contact lens wear.
- •Have entropion, ectropion, chalazia, recurrent styes, glaucoma, history of recurrent corneal erosions.
- •Have any current ocular infection or inflammation.
- •Have any current ocular abnormality that may interfere with contact lens wear.
研究组 & 干预措施
Market Product
Eligible subjects will be dispensed the study lenses in a bilateral fashion and will be in the treatment for approximately 5 weeks.
干预措施: Bausch + Lomb Ultra® Multifocal for Astigmatism (Device)
结局指标
主要结局
Binocular High Luminance High Contrast logMAR Visual Acuity
时间窗: 4-Week Follow-up
Binocular visual acuity was measured on a logMAR (Logarithm of Minimal Angle of Resolution) scale under high luminance high contrast condition. At distance (4 meters), VA is assessed using ETDRS (Early Treatment Diabetic Retinopathy Study) charts; while near (40 cm) and intermediate (64 cm) assessments were made using reduced Guillon-Poling charts. Letter-by-letter results calculated the visual performance score for each chart read. LogMAR scores closer to zero, or below zero, indicate a better visual acuity. A logMAR visual performance score of 0.0 is equivalent to Snellen visual acuity of 20/20.
次要结局
未报告次要终点