Presbyopia Eye Diseases
Conditions
Interventions
Part 1 will be an exploratory part following a clinic based, prospective, randomized cross-over study design testing the sensitivity to defocus of both linear sinusoidal contrast sensitivity and lette
Sponsors
Optometric Technology Group Ltd
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Age 40 to 50 years 2. Spectacle refraction: Distance: Sphere: -6.00D to + 2.00D Astigmatism: 0.00D to -0.75D Near Add +0.50 to +2.50D 3. Spectacles or soft contact lenses habitual vision correction 4. Best corrected visual acuity of at least 20/25 in each eye
Exclusion criteria
Exclusion criteria: 1. Any history of eye disease, injury or abnormality that affects any part of the eye that affects vision 2. Any active eye disease that affects any part of the eye that affects vision 3. Corneal hypoesthesia (reduced corneal sensitivity), if not aphakic 4. 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 ocular medication that may affect vision and its stability as determined by the investigator 5. 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
| Measure | Time frame |
|---|---|
| Measurement of Contrast sensitivity at photopic (85cd/m²) and mesopic (3cd/m²) luminance using timed controlled contrast sensitivity visual acuity with the OTGi vision suite and M&S Technology between four and nine times during the study visit | — |
Secondary
| Measure | Time frame |
|---|---|
| Measurement of high contrast timed logMAR visual acuity at photopic (85 cd/m²) luminance using timed controlled visual acuity using OTGi vision suite 9 times during the first study visit | — |
Countries
England, United Kingdom
Contacts
Public ContactDeborah Moore
Outcome results
None listed