Related Experiment Video

Updated: Jul 4, 2026

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

Effect of progressive addition lenses on myopia progression in Japanese children: a prospective, randomized,

Satoshi Hasebe1, Hiroshi Ohtsuki, Takafumi Nonaka

  • 1Department of Ophthalmology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan. shasebe@md.okayama-u.ac.jp

Investigative Ophthalmology & Visual Science
|June 27, 2008
PubMed

Insights

Progressive addition lenses (PALs) slowed myopia progression in Japanese children compared to single-vision lenses (SVLs). Early use of PALs demonstrated a greater benefit in slowing myopia progression.

Area of Science:

  • Ophthalmology
  • Pediatric Optometry

Background:

  • Myopia progression is a significant concern in childhood.
  • Understanding effective interventions is crucial for managing pediatric refractive errors.

Purpose of the Study:

  • To evaluate the clinical effectiveness of progressive addition lenses (PALs) versus single-vision lenses (SVLs) in slowing myopia progression in Japanese children.
  • To compare the impact of early versus later use of PALs.

Main Methods:

  • A prospective, randomized, double-masked, crossover trial involving 92 children aged 6-12 years with myopia.
  • Participants wore either PALs (+1.50 D near addition) or SVLs for 18 months, followed by the alternative for another 18 months (3-year follow-up).
  • Myopia progression was measured using cycloplegic autorefraction.

Main Results:

  • Progressive addition lenses (PALs) showed a statistically significant effect in slowing myopia progression compared to single-vision lenses (SVLs) (P = 0.0007).
  • A mean difference of 0.17 D in myopia progression was observed over 18 months.
  • A significant treatment-by-period interaction indicated that earlier use of PALs resulted in slower myopia progression.

Conclusions:

  • Progressive addition lenses (PALs) can slow myopia progression in Japanese children, though the effect size is modest.
  • The findings suggest that initiating PAL wear earlier in childhood may yield greater benefits for myopia control.
  • Early application of PALs is likely more beneficial for the studied age and refractive error ranges.
Abstract

More Related Videos

Inducement and Evaluation of a Murine Model of Experimental Myopia07:20

Inducement and Evaluation of a Murine Model of Experimental Myopia

Published on: January 22, 2019

Related Concept Videos

Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...