T30 for Astigmatism in Digital Device Users

Completed · Not applicable

Conditions studied: Contact Lens Complication, Astigmatism, Refractive Errors

In brief

This study aims to determine if Total30 lenses for astigmatism can be successfully fit in participants who are heavy digital device users.

Key facts

Study ID

NCT06266728

Run by

Southern College of Optometry

People needed

48

Starts

2024-03-15

Expected to finish

2024-08-18

Last updated by the study team

2025-02-24

Who can join

Age: 18 and older, up to 40. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Adult (18- to 40-year-old)
• 0.00 LogMAR visual acuity or better in their habitual CLs or by manifest refraction in both eyes
• Smart phone with text messaging capabilities
• Existing wearers of soft, frequent replacement toric CLs within past 6 months
• Frequent digital device user (e.g., phone, iPad, computer, social media, video streaming, etc.) defined as at least 8 hours of usage per day
• Willing to follow the required wear schedule
• Astigmatism ranging from 0.75 D to 2.50 D in each eye
• Willing to wear their CLs at least 13 hours/day
• Exclusion Criteria: Have known systemic health conditions that are thought to alter tear film physiology (e.g., Sjögren's syndrome).
• Have a known history of being diagnosed with dry eye disease
• Have a history of ocular surgery within the past 12 months
• Have a history of severe ocular trauma, active ocular infection or inflammation
• Have a history of viral eye disease
• Currently using isotretinoin-derivatives or ocular medications
• Currently using a dry eye treatment including but not limited to artificial tears
• Currently using rewetting drops daily or occasionally
• If they are pregnant or breast feeding
• Need for spectacle add power of any amount (presbyopic)
• Currently wearing T30fA CLs
• Have a history of wearing hard CLs
• Subjects who show excessive lens oscillation with the T30fA lenses during the fitting process yet show 0.0 logMAR acuity, will be excluded from the study.
• Patients who report unstable vision while wearing their habitual or study CLs (e.g., rotational instability of CLs)
• Willing to not use any artificial tears or dry eye treatments during the study
• Willing to not use rewetting drops during the study

Where it is running

• Kannar Eye Care — Pittsburg, Kansas, United States
• Coldwater VIsion Center — Coldwater, Mississippi, United States

Full record on ClinicalTrials.gov

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