الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Cataract accounts for 33% of all incidences of visual impairment worldwide and is the leading cause of blindness globally. Phacoemulsification of the crystalline lens, followed by capsular bag implantation of an intraocular lens (IOL), is the current standard of care for patients with cataracts. The goal of cataract surgery and IOL implantation is to improve visual acuity for an optimal refractive target, with minimal complications; however, the perceived success of the procedure may vary according to patients’ visual demands and activities.
Monofocal IOLs, which provide effective distance vision, currently account for the majority of IOL implantations. Depending on their visual demands, patients who have undergone cataract surgery with implantation of monofocal IOLs may require spectacles to perform near-distance (e.g., reading) or intermediate-distance (e.g., using a computer) tasks.
Multifocal IOLs that maintain distance focus and improve near and intermediate vision had been developed to reduce spectacle dependence. 4 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.5 However, halos and reduced contrast sensitivity have been associated with multifocal IOLs 4, 5 and are common reasons for patient dissatisfaction.
Trifocal technology has been developed to create a true intermediate focus to overcome these difficulties initial reports on the visual outcomes of the Physiol trifocal IOLs are encouraging.
The FineVision IOL (PhysIOL, Liege, Belgium) was the first commercially available diffractive trifocal IOL. It is a single piece, aspheric, hydrophilic acrylic foldable IOL that has two diffractive patterns, one with a +3.5-D addition for near vision and the other with a +1.75-D addition for intermediate vision. It has an overall diameter of 10.75 mm and an optic diameter of 6.15 mm. The posterior side of the lens is aspheric, with a diffractive design over the anterior surface. The design has been apodized to improve night vision. The theoretical light distribution for a 20 D diffractive FineVision IOL is 42% for far, 15% for intermediate, and 29% for near focus, with 14% lost energy at 3-mm pupil diameter.
Our study was a prospective randomized interventional study which included 36 eyes of 18 patents that underwent uncomplicated phacoemulsifcation surgery. 36 eyes were implanted with the FineVision IOL.