Quantification of the pinhole effect
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Traumatic iridodialysis and mydriasis: Surgical reconstruction of the iris-lens-diaphragm with an iris implant and Intraocular lens
2022, American Journal of Ophthalmology Case ReportsCitation Excerpt :The cosmetic results are excellent, as the implant is customized to match the remaining iris tissue or the fellow eye.14,16,17 A significant increase in visual acuity after combined AI and IOL implantation has been reported,15 which can mainly be attributed to the correction of aphakia or cataract, as the pupil diameter of 3.35 mm is too large to create a pinhole effect.18 In cases like this with suture fixated AI, the use of an AI with a polymer fiber meshwork is recommended.
Cataracts and presbyopia
2022, Handbook of Basic and Clinical Ocular Pharmacology and TherapeuticsBilateral Artificial Iris implantation in patients with bilateral iris defects
2021, American Journal of Ophthalmology Case ReportsCitation Excerpt :Miller et al. examined the pinhole effect with different sizes of pinholes. They did not find a strong effect with a pupil size of 2.5 mm.18 Therefore it is unlikely that the even bigger aperture of the AI can create a pinhole effect that improves CDVA.
Visual results of progressive multifocal posterior chamber intraocular lens implantation
1996, Journal of Cataract and Refractive SurgeryAn optical model to describe image contrast with bifocal intraocular lenses
1990, American Journal of OphthalmologyEffects of Miosis on the Visual Acuity Space under Varying Conditions of Contrast and Ambient Luminance in Presbyopia
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