Presbyopia
Conditions
Brief summary
Patients who underwent presbyopic correction with bilateral trifocal intraocular lenses implantation are supposed to have sufficient uncorrected vision capacity for activities of daily living (ADLs) that require near vision acuity (NV), (ie. book reading). However, it is known that light intensity and temperature has a great impact on near vision capacity. Primary objective of this study is to identify the optimal task lighting conditions (in terms of light intensity and temperature) for ADLs that demand near vision acuity for a sample of patients who underwent presbyopic correction with bilateral trifocal intraocular lenses implantation
Detailed description
Patients who underwent presbyopic correction with bilateral trifocal intraocular lenses implantation are supposed to have sufficient uncorrected vision capacity for activities of daily living (ADLs) that require near vision acuity (NV), (ie. book reading). However, it is known that light intensity and temperature has a great impact on near vision capacity. Primary objective of this study is to identify the optimal task lighting conditions (in terms of light intensity and temperature) for ADLs that demand near vision acuity for a sample of patients who underwent presbyopic correction with bilateral trifocal intraocular lenses implantation. The following light intensities will be evaluated: 25, 50, and 75 foot candles. Moreover, the following light temperatures will be evaluated: 3000, 4000, and 6000 Kelvins.
Interventions
PROCEDUREPhaco / Panoptix
Phacoemulsification with bilateral diffractive trifocal lens implantation
Sponsors
Democritus University of Thrace
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
50 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
Presbyopia
Exclusion criteria
Glaucoma Corneal pathology Fundus pathology Severe neurological/mental diseases that interfere with visual acuity
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| uNVC (6000K) | 6 months | Uncorrected Near Vision Capacity at 6000 Kelvins |
| uNVC (3000K) | 6 months | Uncorrected Near Vision Capacity at 3000 Kelvins |
| uNVC (4000K) | 6 months | Uncorrected Near Vision Capacity at 4000 Kelvins |
| uNVC (25FC) | 6 months | Uncorrected Near Vision Capacity at 25 Foot Candles |
| uNVC (50FC) | 6 months | Uncorrected Near Vision Capacity at 50 Foot Candles |
| uNVC (75FC) | 6 months | Uncorrected Near Vision Capacity at 75 Foot Candles |
Countries
Greece
Outcome results
None listed