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Effect of uncorrected astigmatism on vision

MiSIght effect of uncorrected astigmatism on visual acuity non-dispensing study

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN28719734
Enrollment
30
Registered
2022-08-31
Start date
2022-08-15
Completion date
Unknown
Last updated
2024-02-19

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

Conditions

Myopia Eye Diseases Myopia

Interventions

Participants will be fitted with the study contact lenses per their fitting guide. Participants will then wear three pairs of spectacles in a randomised crossover fashion. The control (plano) correcti

Sponsors

CooperVision International Limited
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Age 8 to 16 years 2. Current soft contact lens wearers 3. Spectacle refraction: -0.75 to -6.00 D spherical equivalent, with cylinder of -0.50 DC to -1.75 DC 4. Best corrected visual acuity of at least 20/25 in each eye 5. Have normal eyes with the exception of the need for visual correction 6. Parent/guardian and participant have read and understood the Participant Information Sheet 7. Parent/guardian and participant have read, signed and dated the Informed Consent and Assent (when applicable)

Exclusion criteria

Exclusion criteria: To be eligible as a participant, each candidate shall be free of any ocular or medical condition that may affect the results of this study. The following are specific criteria that exclude a candidate from enrolment in this study: 1. Ocular anterior segment infection, inflammation, abnormality, or active disease that would contraindicate contact lens wear 2. Newly prescribed (within the past 30 days) use of some systemic medications (such as antihistamines, decongestants, diuretics, muscle relaxants, tranquilizers, stimulants, anti-depressants, anti-psychotics, oral contraceptives) or new prescription eyedrops which is not rewetting/lubricating eyedrops for which contact lens wear could be contraindicated as determined by the investigator 3. Monocular participants (only one eye with functional vision) or participants fit with only one lens 4. Subjects with slit lamp findings greater than grade 2 or higher (e.g. oedema, infiltrates, corneal neovascularization, corneal staining, tarsal abnormalities, conjunctival, anterior segment inflammation) as per ISO 11980, any previous history or signs of a contact lens related corneal inflammatory event (past corneal ulcers), or any other ocular abnormality that may contraindicate contact lens wear at the enrolment visit 5. History of herpetic keratitis, ocular surgery or irregular cornea 6. Enrolment of the family members of the investigator, family members of the investigator’s staff, or individuals living in the households of these individuals

Design outcomes

Primary

MeasureTime frame
Overall timed logMAR visual acuity measured after 20 minutes of spectacle wear

Secondary

MeasureTime frame
Visual acceptance measured using 0-100 VAS questions after approximately an hour and a half of wear

Countries

England, United Kingdom

Contacts

Public ContactDeborah Moore
dmoore@otg.co.uk+44 (0)2072224224

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026