Retinal images in optomechanical eye model with monofocal intraocular lens
نویسندگان
چکیده
Intraocular lens (IOL) is an artificial lens implanted into the eye. It usually replaces the existing crystalline lens, which is clouded over due to a cataract. In order to evaluate the optical performance of different IOLs an optomechanical model of human eye was developed. This model closely reproduces anatomical and optical properties of the average human eye. This makes it possible to measure the optical performance of different types of intraocular lenses and to estimate the influence of their location in eye on quality of vision. Four monofocal intraocular lenses were taken for analysis. The analysis of the quality of retinal images was carried out by means of either qualitative image comparison or physical quantities estimation. The analysis of LSF and MTF shows that the performance of the lenses tested changes slightly with differences in their design and/or material.
منابع مشابه
Appearance of images through a multifocal intraocular lens.
The appearance of images through a multifocal intraocular lens (IOL) was simulated. The optical transfer function (OTF) of a model eye containing the multifocal lens was measured and divided by the OTF of the model eye with a monofocal IOL. This ratio was used to filter digital images, generating simulations that represent the retinal images seen through a multifocal intraocular lens when viewe...
متن کاملCorneal optical aberrations and retinal image quality in patients in whom monofocal intraocular lenses were implanted.
OBJECTIVES To compare retinal image quality and optical corneal aberrations in patients in whom monofocal polymethyl methacrylate intraocular lenses (IOLs) were implanted with those in healthy subjects of a similar older age (60-70 years old) and to use the results to suggest improved optical designs of IOLs to maximize retinal image quality. METHODS A double-pass apparatus was used to measur...
متن کاملThrough focus image quality of eyes implanted with monofocal and multifocal intraocular lenses
Intraocular lenses (lOLs) are commonly implanted in cataract surgery. Initially lOLs were mainly monofocal, but at present there are many multifocal lOLs available, which are being implanted. Multifocal lOLs have the potential advantage of reducing the dependence on spectacle correction for near vision after cataract surgery. Because the multifocal lOLs superimpose the near and far images on th...
متن کاملEvaluation of rotation and visual outcomes after implantation of monofocal and multifocal toric intraocular lenses.
PURPOSE To evaluate rotational stability and its influence on postoperative visual acuity of different monofocal and multifocal toric intraocular lenses (IOLs). METHODS A prospective interventional study was designed. Ninety-one patients with a mean age of 71.65 ± 11.82 years were implanted with toric IOLs after phacoemulsification. Three monofocal toric IOLs (the Lentis LT [Oculentis, Berlin...
متن کاملQuality of vision through diffractive bifocal intraocular lenses.
Two elderly women have each received a monofocal intraocular lens in one eye and a 3M diffractive bifocal intraocular lens in the other eye. Both eyes were shown to have equivalent retinal/neural function by measuring contrast sensitivity to laser interference fringes which bypassed refractive and other defects of the ocular media. The eyes with a bifocal intraocular lens displayed a much great...
متن کامل