Presbyopia
Conditions
Keywords
multifocality, monovision
Brief summary
The main purpose of this study was to identify electrophysiological predictive markers of post-correction visual comfort for presbyopic patients.
Detailed description
For each participant, presbyopia was compensated with contact lenses by monovision during three weeks and multifocality (three weeks again). A break of two weeks without any presbyopia compensation came in between the two phases of the test that were randomized. All subjects were tested three times: before any compensation, after three weeks with monovsion and after three weeks with multifocality. Each testing session was strictly the same including visual examinations and VEPs (visual evoked potentials).
Interventions
DEVICEcontact lenses
Presbyopia was compensated with contact lenses by monovision and multifocality.
Sponsors
University Hospital, Tours
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
45 Years to 60 Years
Healthy volunteers
No
Inclusion criteria
* normal acuity
Exclusion criteria
* stereoacuity disorder * neurological disorders
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Visual acuity at baseline | baseline | near and distance visual acuity (Monoyer and Parinaud scales) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| electrophysiological recordings change with monovision | after 3 weeks with monovision contact lenses | monocular and binocular pattern Visual Evoked Potentials in response to a checkerboard pattern N75 and P100 components : amplitude, latency and topography |
| electrophysiological recordings with multifocality | after 3 weeks with multifocality contact lenses | monocular and binocular pattern Visual Evoked Potentials in response to a checkerboard pattern N75 and P100 components : amplitude, latency and topography |
| quantitative measurement of stereopsis at baseline | baseline | TNO plates |
| electrophysiological recordings at baseline | baseline | monocular and binocular pattern Visual Evoked Potentials in response to a checkerboard pattern N75 and P100 components : amplitude, latency and topography |
| quantitative measurement of stereopsis with multifocality | after 3 weeks with multifocality contact lenses | TNO plates |
| Visual acuity change with monovision | after 3 weeks with monovision contact lenses | near and distance visual acuity (Monoyer and Parinaud scales) |
| Visual acuity change with multifocality | after 3 weeks with multifocality contact lenses | near and distance visual acuity (Monoyer and Parinaud scales) |
| quantitative measurement of stereopsis with monovision | after 3 weeks with monovision contact lenses | TNO plates |
Countries
France
Outcome results
None listed