Presbyopia
Conditions
Keywords
presbyopia compensation, EDF, Light Sword Lens
Brief summary
Clinical assessment of a new optical element for presbyopia compensation - the Light Sword Lens.
Detailed description
Healthy dominant eyes of presbyopes were examined for visual performance. The examination was performed in the ophthalmic trial frame, which included assessment of 3 trials: reference (with lens for distance correction); stenopeic (distance correction with a pinhole ϕ=1,25 mm) and Light Sword Lens (distance correction with a Light Sword Lens). In each trial, visual acuity was assessed in 7 tasks for defocus from 0.2D to 3.0D while contrast sensitivity in 2 tasks for defocus 0.3D and 2.5D.
Interventions
DEVICEVisual Acuity Examination with a novel lens
Visual Acuity Examination with a novel lens set in an ophthalmic trial frame
Sponsors
Warsaw University of Technology
Military Institute od Medicine National Research Institute
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
45 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* emmetropic or hyperopic eyes with a spherical error of maximum +1.75D and astigmatism of ≤ 0.5D. * Corrected distance visual acuity (CDVA) had to be better than 0.1 logMAR (20/25) and at the same time contrast sensitivity (CS) could not be less than 1.9 logCS. -Uncorrected near visual acuity was required to be worse than 0.4 logMAR (20/50), as a proof of presbyopia.
Exclusion criteria
* any history of ophthalmic surgeries * evidence of serious ocular or brain pathologies affecting visual acuity (VA) * clinically active inflammation.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Visual Acuity based on The Early Treatment Diabetic Retinopathy Study protocol | day one | Examination for visual performance in 3 trials: reference (with lens for distance correction); stenopeic (distance correction with a pinhole ϕ=1,25 mm) and Light Sword Lens (distance correction with a Light Sword Lens). In each trial, visual acuity assessment in 7 tasks for defocus from 0.2D to 3.0D. The degree of homogeneity through defocus was determined. Reference and stenopeic trials were compared to Light Sword Lens results. Statistical analysis: Friedman analysis of variance, Nemenyi post-hoc, Wilcoxon tests , p-value \< 0.05 is considered significant. |
| Contrast sensitivity based on Pelli-Robson method | day one | Contrast sensitivity assessment in 2 tasks for defocus 0.3D and 2.5D The degree of homogeneity through defocus was determined. Reference and stenopeic trials were compared to Light Sword Lens results. Statistical analysis: Friedman analysis of variance, Nemenyi post-hoc, Wilcoxon tests , p-value \< 0.05 is considered significant. |
Outcome results
None listed