Performance of Toric Hydrogel Lenses Following A Refit With Toric Silicone Hydrogel Lenses for 1 Month
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 43
- 试验地点
- 1
- 主要终点
- Number of Participants With Lens Centration Assessment by the Investigator - Fanfilcon A Toric Contact Lenses
研究概览
简要总结
The aim of this prospective study is to evaluate the clinical performance of habitual wearers of methafilcon A toric lenses after a refit with fanfilcon A toric lenses for 1-month of daily wear.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Other
- 盲法
- None
盲法说明
Study lenses will be transferred, by an assistant, out of their packaging to unmarked new contact lens cases filled with unpreserved sterile saline just prior to dispensing to maintain subject masking of the study lenses
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Is between 18 and 40 years of age (inclusive)
- •Has had a self-reported visual exam in the last two years
- •Is an adapted soft contact lens wearer
- •Has a contact lens spherical prescription between +6.00 to - 8.00 (inclusive)-Have no less than -0.75D of astigmatism and no more than -2.25 D in both eyes
- •Can achieve best corrected spectacle distance visual acuity of 20/25 (0.10 logMAR) or better in each eye.
- •Can achieve a distance visual acuity of 20/30 (0.18 logMAR) or better in each eye with the study contact lenses.
- •Has clear corneas and no active ocular disease
- •Has read, understood and signed the information consent letter
- •Patient contact lens refraction should fit within the available parameters of the study lenses
- •Is willing to comply with the wear schedule (at least 5 days per week, >8 hours/day assuming there are no contraindications for doing so)
- •Is willing to comply with the visit schedule
排除标准
- •Has a Contact Lens (CL) prescription outside the range of the available parameters of the study lenses
- •Has a spectacle cylinder less than -0.75D or more than -2.50 D of cylinder in either eye
- •Has a history of not achieving comfortable Contact Lens (CL) wear (5 days per week; > 8 hours/day)
- •Has contact lens best corrected distance vision worse than 20/25 (0.10 logMAR) in either eye
- •Presence of clinically significant (grade 2-4) anterior segment abnormalities
- •Presence of ocular or systemic disease or need of medications which might interfere with contact lens wear
- •Slit lamp findings that would contraindicate contact lens wear such as:
- •Pathological dry eye or associated findings
- •Pterygium, pinguecula, or corneal scars within the visual axis
- •Neovascularization > 0.75 mm in from of the limbus
- •Giant papillary conjunctivitis (GCP) worse than grade 1
- •Anterior uveitis or iritis (past or present)
- •Seborrheic eczema, Seborrheic conjunctivitis
- •History of corneal ulcers or fungal infections
- •Poor personal hygiene
- •Has a known history of corneal hypoesthesia (reduced corneal sensitivity)
- •Has aphakia, keratoconus or a highly irregular cornea
- •Has Presbyopia or has dependence on spectacles for near work over the contact lenses
- •Has undergone corneal refractive surgery
- •Is participating in any other type of eye related clinical or research study.
结局指标
主要结局
Number of Participants With Lens Centration Assessment by the Investigator - Fanfilcon A Toric Contact Lenses
时间窗: 4 weeks
Lens centration was assessed on a 3-point scale (1=optimal centration, 2=decentration acceptable, 3=decentration unacceptable).
Percentage of Participants With Corneal Coverage Assessment by the Investigator - Fanfilcon A Toric Contact Lenses
时间窗: 4 weeks
Corneal coverage was collected on a YES/NO response. Yes - lens covers the cornea, No - lens does not cover the cornea
Post-blink Movement Assessment by the Investigator - Methafilcon A Toric Contact Lenses
时间窗: 4 weeks
Post-blink movement was assessed on a 0-4 scale (where: 0=Insufficient, unacceptable movement,1=Minimal, but acceptable movement, 2=Optimal movement, 3=Moderate, but acceptable movement, 4=Excessive, unacceptable movement).
Lens Orientation in Primary Position of Gaze Assessment by the Investigator - Fanfilcon A Toric Contact Lenses
时间窗: 4 weeks
Lens orientation was assessed in 5-degree steps with the slit lamp by measuring the amount of mislocation of the axis mark on the lens relative to the 6 o'clock position.
Overall Lens Fit Acceptance by the Investigator - Fanfilcon A Toric Contact Lenses
时间窗: 4 weeks
Overall lens fit acceptance assessed using grade (0-4) 0=Should not be worn, 1=Borderline but unacceptable, 2=Minimal acceptable, early review, 3=Not perfect but okay to dispense, 4=perfect.
Number of Participants With Lens Centration Assessment by the Investigator - Methafilcon A Toric Contact Lenses
时间窗: 4 weeks
Lens centration was assessed on a 3-point scale (1=optimal centration, 2=decentration acceptable, 3=decentration unacceptable).
Post-blink Movement Assessment by the Investigator - Fanfilcon A Toric Contact Lenses
时间窗: 4 weeks
Post-blink movement was assessed on a 0-4 scale (where: 0=Insufficient, unacceptable movement,1=Minimal, but acceptable movement, 2=Optimal movement, 3=Moderate, but acceptable movement, 4=Excessive, unacceptable movement).
Rotational Recovery Assessment by the Investigator - Fanfilcon A Toric Contact Lenses
时间窗: 4 weeks
Lens rotational recovery was assessed in 5-degree steps 1 minute after the lens was manually rotated 45degrees temporally from the primary gaze position
Rotational Recovery Assessment by the Investigator - Methafilcon A Toric Contact Lenses
时间窗: 4 weeks
Lens rotational recovery was assessed in 5-degree steps 1 minute after the lens was manually rotated 45degrees temporally from the primary gaze position
Percentage of Participants With Corneal Coverage Assessment by the Investigator - Methafilcon A Toric Contact Lenses
时间窗: 4 weeks
Corneal coverage was collected on a YES/NO response. Yes - lens covers the cornea, No - lens does not cover the cornea
Lens Orientation in Primary Position of Gaze Assessment by the Investigator - Methalfilcon A Toric Contact Lenses
时间窗: 4 weeks
Lens orientation was assessed in 5-degree steps with the slit lamp by measuring the amount of mislocation of the axis mark on the lens relative to the 6 o'clock position.
Overall Stability Assessment by the Investigator - Methafilcon A Toric Contact Lenses
时间窗: 4 weeks
Overall lens stability was assessed using a 0 - 4 scale (where 0 = very poor stability, and 4 = excellent stability).
Overall Stability Assessment by the Investigator - Fanfilcon A Toric Contact Lenses
时间窗: 4 weeks
Overall lens stability was assessed using a 0 - 4 scale (where 0 = very poor stability, and 4 = excellent stability).
Overall Lens Fit Acceptance by the Investigator - Methafilcon A Toric Contact Lenses
时间窗: 4 weeks
Overall lens fit acceptance assessed using grade (0-4) 0=Should not be worn, 1=Borderline but unacceptable, 2=Minimal acceptable, early review, 3=Not perfect but okay to dispense, 4=perfect.
次要结局
- Average Daily Wearing Time - Methafilcon A Toric Contact Lenses(4 weeks)
- Average Comfortable Wearing Time - Fanfilcon A Toric Contact Lenses(4 weeks)
- Average Comfortable Wearing Time - Methafilcon A Toric Contact Lenses(4 weeks)
- Average Daily Wearing Time - Fanfilcon A Toric Contact Lenses(4 weeks)