Refractive Errors
Conditions
Brief summary
Multifocal IOLs that maintain distance focus and improve near vision have been developed to reduce spectacle dependence.Multifocal IOLs improve patient performance of near-vision tasks, such as reading crafts, hobbies, and social activities to a greater extent than do monofocal IOLs. However, halos and reduced contrast sensitivity have been associated with multifocal IOLs and are common reasons for patient's dissatisfaction.Trifocal technology has been developed to create intermediate focus to overcome these difficulties. Continuous reports of the visual outcomes of the FineVision trifocal IOLs are encouraging.
Detailed description
Monofocal IOLs, which provide effective distance vision, currently account for the majority of IOLs implantations. Patients who have undergone cataract surgery with implantation of monofocal IOL may require spectacles to perform near-distance (e.g., reading) or intermediate-distance (e.g., using a computer) tasks depending on their visual demandsMultifocal IOLs that maintain distance focus and improve near vision have been developed to reduce spectacle dependence.Multifocal IOLs improve patient performance of near-vision tasks, such as reading crafts, hobbies, and social activities to a greater extent than do monofocal IOLs. However, halos and reduced contrast sensitivity have been associated with multifocal IOLs and are common reasons for patient's dissatisfaction.Trifocal technology has been developed to create intermediate focus to overcome these difficulties. Continuous reports of the visual outcomes of the FineVision trifocal IOLs are encouraging.
Interventions
DEVICETrifocal diffractive intraocular lens
Trifocal IOL having foldable single-piece fully diffractive pupil dependent aspheric IOL. Which have been made of hydrophilic acrylic with an ultraviolet (UV) and blue light inhibitor. It has an optic diameter of 6.15 mm and an overall diameter of 10.75 mm; it has +3.5D additional power for near vision and +1.75 D additional power for intermediate vision, consisting of 26 diffractive steps.
Sponsors
Alexandria University
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Intervention model description
This is a prospective, non-comparative, non-randomized study including 36 eyes had implantation of trifocal diffractive IOL
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
* patient eyes had cataract with no other pathology, patients desire for spectacle independence after surgery and with realistic expectation.
Exclusion criteria
* Any ocular comorbidity that affect the end results of the surgery, history of ocular trauma, irregular corneal astigmatism, pupil abnormalities and capsular or zonular abnormalities that may affect postoperative centration as tilt of the lens (e.g. pseudo exfoliation syndrome and Marfan's syndrome).
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Visual Acuity | 3 months | Current study used Sloan chart (Good - Lite Co, USA) for intermediate, Snellen chart for far and Landolt ring chart for near vision |
| Defocus curve | 3 months | examined monocular and binocular after correcting distant VA refractive error then inserting defocus lenses 0.50-D focus steps from (+1.50 to -3.50 D) in the trial frame |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Contrast sensitivity | 3 months | using the CSV-1000 contrast test. |
| Visual Satisfaction Questionnaire | 3 months | Questionnaire patient satisfaction protocol mediated by (PhysIOL Lige, Belgium). |
Countries
Egypt
Outcome results
None listed