Advancing Myopia Control in Children: A Randomized Controlled Trial of Two Novel Daily Disposable Contact Lenses
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 126
- 试验地点
- 1
- 主要终点
- Cycloplegic refraction change in spherical equivalent refraction (SER)
研究概览
简要总结
The goal of this study is to investigate the myopic control efficacy of two study soft contact lenses in children. Participants will be prescribed Lens A, Lens B or single vision contact lenses for the first year. Participants in single vision contact lenses group will switch to Lens A at 12 months. All participants will then continue lens wear for an additional 12 months. Their cycloplegic refraction and axial length will be monitored every 6 months for 2 years.
详细描述
This is a double-masked and randomized controlled trial. Participants will be randomly assigned to one of three interventions: two study contact lenses (CL)(Lens A or Lens B) or single vision (SVCL) for the initial 12 months. While the Lens A/B groups will continue their respective lenses, the participants initially assigned to the SVCL will cross over to Lens A at the 12-month mark. All participants will then continue lens wear for an additional 12 months. Their cycloplegic refraction and axial length will be monitored every 6 months for 2 years.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 7 Years 至 12 Years（Child）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •• Age at enrolment: 7 - 12 (both inclusive) years old Hong Kong Chinese schoolchildren
- •Refractive errors in terms of spherical equivalent refraction (SER) determined by cycloplegic autorefraction: -0.75 diopters (D) to -5.00D in both eyes
- •Astigmatism: equal or less than -1.00D
- •Anisometropia: equal or less than -1.75D
- •Previous myopia progression:
- •-0.50D (in SER) per year or more in 1 eye or both eyes OR Axial length elongation: 0.27mm/year in 1 eye or both eyes
- •If myopia is initially detected during screening, eligibility requires an SER below the 3rd percentile curve of refraction in either or both eyes (4)
- •Best corrected visual acuity: better than 0.04 LogMAR in both eyes
- •Ocular health: no abnormalities in both internal and external ocular health
- •Systemic health: no systemic interference with ocular vision functioning
- •Binocular vision: no strabismus and other binocular abnormalities
- •No medication or supplements that affect eye growth
- •Normal colour vision
- •No previous use of myopic control interventions such as red-light therapy, atropine, orthokeratology, specialized spectacle lenses and contact lenses and oral supplements for myopic control
- •Agree to maintain the visit schedule and be able to keep all appointments as specified in the informed assent and consent forms throughout study duration.
- •Agree to accept either the control or study lens as assigned by the randomization scheme
- •Agree to wear the assigned contact lenses for a minimum of 10 hours per day, at least 6 days per week, for the duration of the 2-year study and to inform the study investigator if this schedule is interrupted. Wearing time may be modified by the study staff for health reasons
- •Agree to adhere to contact lens use requirements throughout study duration
- •Acceptance of the masked study design
排除标准
- •Contraindications for soft contact lenses
- •Dry eye with drug intervention within 30 days
- •Regular use of ocular medication (prescription or over-the-counter), artificial tears, or wetting agents due to dryness, allergies or other conditions that hinder the contact lens wear
- •Current use of systemic medications that may significantly affect contact lens wear, tear film production, pupil size, accommodation, or refractive state. These include, but not limited to, long term use of nasal decongestants (e.g., pseudoephedrine, phenylephrine), antihistamines (e.g., chlorpheniramine, diphenhydramine, Prednisolone or Ritalin (methylphenidate)
- •Pre-existing systemic and ocular disease that had an influence on contact lens wearing
- •History of ocular injury or surgery
- •Prior use of myopic control interventions such as red-light therapy, atropine, orthokeratology, specialized spectacle lenses and contact lenses and oral supplements
- •Allergy to cyclopentolate eye drops
- •Subjects who, in the judgment of the Investigator, are unable to cooperate and follow instructions during eye examination
研究组 & 干预措施
Single vision lens group
Participants in single vision contact lens group will receive single vision contact lenses for initial 12 months. They will switch to Lens A at 12-month mark for an additional 12 months.
Lens A group
Participants in Lens A group will receive Lens A contact lenses for 24 months.
干预措施: Lens A (Other)
Lens B group
Participants in Lens B group will receive Lens B contact lenses for 24 months.
干预措施: Lens B (Other)
结局指标
主要结局
Cycloplegic refraction change in spherical equivalent refraction (SER)
时间窗: Baseline, 6, 12, 18 and 24 months
Cycloplegic SER (in diopter) will be measured using an open field autorefractor. Change in SER with cycloplegia from the baseline every 6 months for 2 years over the study period.
次要结局
- Axial length changes(Baseline, 6, 12, 18 and 24 months)