Evaluation of Progressive Power Lenses Designs

Evaluation of the three basic designs of progressive power lenses

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

CRIS

Registry ID

KCT0006259

Enrollment

120

Registered

2021-06-16

Start date

2021-07-12

Completion date

Unknown

Last updated

2021-10-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Medical Device : A total of 120 subjects wore progressive power lenses of three basic designs (standard type, intermediate-near enhancement type, and far-field enhancement type) in double blinded, ran

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Subjects should be experienced HOYA or NON-Hoya progressive power lens designs wearers who have worn their current prescription for at least the last one month. 2. Hoya or NON-Hoya PAL wearers who have no issues about wearing a progressive power lens design with corridor length of 14mm. 3. Age: 45 to 70 years old 4. Best corrected monocular visual acuity (decimal) both at distance and near = 1.0; 5. Normal binocular vision at distance & near: 6. New prescription (found at visit #1) is in the range: - Spherical power: up to +/-6.00; - Cylindrical power: minus cylinder = 2.5D; - Addition: 1.50-2.50D; - Difference in the power (spherical equivalent) between eyes: up to 2.0D 7. Understanding and speaking Korean to be able to answer questionnaires 8. Giving a written consent to participate in the study

Exclusion criteria

Exclusion criteria: 1. First prescription for progressive lenses 2. Prescription during visit #1 varies from previous prescription more than 0.50 D in any meridian 3. Wearing single vision lenses with accommodative support 4. Double vision or prismatic prescription in current glasses 5. Known ocular disease including strabismus, any pathology, any eye surgeries that may affect visual acuity 6. Use of systematic or ocular medications that are likely to affect vision 7. Balance problem/vertigo problem 8. Concurrent participation in other vision-related research

Design outcomes

Primary

Measure	Time frame
To evaluate the preference, adaptability and visual performance of three basic progressive lens designs	—

Secondary

Measure	Time frame
Non-invasive visual function test(Distance and near visual acuity)	—

Countries

Korea, Republic of

Contacts

Public ContactKichoong Mah

Eulji University

kcmah@eulji.ac.kr+82-31-740-7262

Outcome results