Effects of Wearing Progressive Addition Lens on Working Distance and Refractive Status in Adult Computer Users

NCT ID: NCT02775396

Last Updated: 2016-05-17

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 64 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2014-09-30
• Study Completion Date: 2015-04-30

Brief Summary

With the increasing reliance on tablet computers and smartphones in daily life, it is important to determine whether and how the prolonged usage of these handheld digital devices influences the working habits and refractive status. This study aimed to determine the effects of wearing conventional single-vision lenses vs. new progressive addition lenses on the working distance and refractive status while playing interactive video game in Chinese pre-presbyopic adult computer users.

Detailed Description

Chinese adult computer users were recruited from two age cohorts. They were prescribed, in random order, with conventional single-vision lenses and progressive addition lenses designed for handheld digital display devices (iPad). Basic ocular parameters were measured through a comprehensive eye examination at the baseline visit. Working distance and refractive shift were measured immediately after delivering the lenses and after one month of lens wear. Working distance were recorded with an automatic ultrasound sensor while the participants were playing a 30-minute video game. Refractive-error shift before and after playing the video game were measured with an open-field autorefractor in both eyes and averaged.

Conditions

Video Game Play Using Handheld Computer

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: NONE

Study Groups

Adult computer user

Wearing each of the two spectacle lens designs for one month in random sequence

Group Type: EXPERIMENTAL

Spectacle lens

Intervention Type: DEVICE

Wearing a spectacle lens design with corrective prescription power while playing computer game using an iPad tablet computer. Two lens designs were prescribed for each participant: the conventional single-vision lens and a new progressive addition lens designed for handheld digital device. Primary outcome measures were performed immediately after each lens delivery and one-month of lens wear.

Interventions

Spectacle lens

Wearing a spectacle lens design with corrective prescription power while playing computer game using an iPad tablet computer. Two lens designs were prescribed for each participant: the conventional single-vision lens and a new progressive addition lens designed for handheld digital device. Primary outcome measures were performed immediately after each lens delivery and one-month of lens wear.

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

• Hong Kong Chinese
• Computer users (computer usage >2hours/day)
• Spherical-equivalent refractive errors between plano and -9.00D and cylindrical power ≤2.50D

Exclusion Criteria

• Anyone with visual acuity worse than 0 logMAR, anisometropia more than 2.00D, abnormal accommodative function, wearing rigid contact lens, and a history of ocular surgery and pathology

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 40 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Carl Zeiss

UNKNOWN

Sponsor Role: collaborator

The Hong Kong Polytechnic University

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Chea-su Kee, PhD

Role: PRINCIPAL_INVESTIGATOR

The Hong Kong Polytechnic University

References

Kee CS, Leung TW, Kan KH, Lam CH. Effects of Progressive Addition Lens Wear on Digital Work in Pre-presbyopes. Optom Vis Sci. 2018 May;95(5):457-467. doi: 10.1097/OPX.0000000000001211.

Reference Type: DERIVED

PMID: 29683984 (View on PubMed)

Other Identifiers

P14-0085

Identifier Type: -

Identifier Source: org_study_id