The two materials form a single lens with a variable index of refraction, similar to a gradient index (GRIN) lens.
et al., “Prospective visual evaluation of apodized diffractive intraocular lenses,” J Cataract Refract Surg, vol. In one implementation, the bag is made from a material with a higher index of refraction than the optically clear medium.
Systems, devices, and methods are presented for a prosthetic injectable intraocular lens. et al., “Feasibility and development of a high-power real accommodating intraocular lens,” J Cataract Refract Surg, 02-08, 2005. et al., “Numerical modeling of the accommodating lens,” Vision Research, 35-51, 2002. et al., “A self-stabilizing lens ring for 25-gauge vitrectomy surgery,” Am J Ophthalmol, 10-351, 2007. et al., “One-year outcomes with new-generation multifocal intraocular lenses,” Ophthalmology, 108-16, 2008. et al., “Clinical evaluation of the Crystalens AT-45 accommodating intraocular lens: Results of the U. Food and Drug Administration clinical trial,” J Cataract Refract Surg, 2-825, 2006. et al., “MRI study of the changes in crystalline lens shape with accommodation and aging in humans,” J Vis, 11(3):19, 1-16, 2011. et al., “Accommodative lens refilling in rhesus monkeys,” Invest Ophthalmol Vis Sci, 76-2984, 2006. Part 2: Pilot clinical evaluation,” J Cataract Refract Surg, -52, 2007. This application is a continuation-in-part application of U. PCO is treated by externally using a neodymium-doped yttrium aluminium garnet (Nd: YAG) laser to remove a section of the posterior capsule.
The lenses can be made from silicone, fluorosilicone, and phenyl substituted silicone and be semipermeable to air. Duane, A., “Normal values of the accommodation at all ages,” JAMA, 59(12):1020-13, 1912. et al., “Change in shape of the aging human crystalline lens with accommodation,” Vision Res, 7-132, 2005. et al., “Meta-analysis of accommodating intraocular lenses,” J Cataract Refract Surg, 2-527, 2007. et al., “Presbyopia and the optical changes in the human crystalline lens with age,” Vision Research, 38(2):209-229, 1998. Kessler, J., “Experiments in refilling the lens,” Arch Ophthalmol, 2-417, 1964. et al., “Accommodation and presbyopia in the human eye—aging of the anterior segment,” Vision Research, 29(12):1685-92, 1989. Pau, H., et al., “The increasing sclerosis of the human lens with age and its relevance to accommodation and presbyopia,” Graefe's Arch Clin Exp Ophthalmol, 24-296, 1990. et al., “Bio-inspired accommodating fluidic intraocular lens,” Opt Lett, 34(20):3214-16, 2009. et al., “Crystalline lens radii of curvature from Purkinje and Scheimpflug imaging,” J Vis, 57-67, 2006. et al., “Age-related changes in human ciliary muscle and lens: Magnetic resonance imaging study,” Invest Ophthalmol Vis Sci, 62-69, 1999. et al., “The mechanism of presbyopia,” Progress in Retinal and Eye Research, 9-393, 2005. Mechanism of Accommodation,” Helmholtz's Treatise on Physiological Optics, pp. It may also be alleviated by cutting the posterior lens capsule with a femtosecond laser.
For example, some accommodating IDLs use fluid movement within the IOL, or a change in fluid pressure within the IOL, to effect optical power change in the IOL. It may therefore also be beneficial to provide silicone oil that has a refractive index that is as close to the refractive index of the bulk material as possible.
The bulk material can also be considered to include the haptic bulk material in the peripheral portion of the IOL.A corneal or scleral incision allows access to the eye and the smaller the incision the less damage will be done and the less time will be needed for the incision to heal.In addition, the intraocular lens is preferably not damaged during delivery, or at most, minimally damaged such that it will not effect the functionality of the intraocular lens.One or more silicone elastomeric patches located outside the optical path on the anterior side but away from the equator can be accessed by surgical needles in order to fill or adjust optically clear fluid within the lens. Glasser, A., “Restoration of accommodation: surgical options for correction of presbyopia,” Clin Exp Optom, 91(3):279-295, 2008. et al., “Development of a ciliary muscle-driven accommodating intraocular lens,” J Cataract Refract Surg, 33-2138, 2008. et al., “Massive increase in the stiffness of the human lens nucleus with age: the basis for presbyopia? International Search Report and Written Opinion dated Jul. Intraocular lenses are often designed with a square edge to prevent lens epithelial cells from migrating to the posterior capsule, and therefore prevents PCO.The fluid can be adjusted in order to set a base dioptric power of the lens and otherwise adjust a lens after its initial insertion. Similar to posterior capsular opacification, anterior capsular opacification can also cause contraction of the lens capsule and visual opacification.