purpose : contrast sensitivity (cs) evaluation by sv–1000e chart in all spatial frequencies after micro incision cataract surgery (mics) and its comparison between two thin lenses after optical correction in natural and glare conditions methods : in this cross sectional study, 100 eyes having mics with dodick arc phacolaser system were evaluated. 50 thinoptx lenses and 50 acrismart lenses were ...

Ultrasonography is the only practical method for obtaining images of the posterior segment of the eye when the light-conducting media are opaque. In this study, 182 dogs with ocular abnormalities presented to the Department of Veterinary Surgery and Radiology from December 2008-August 2010 were included. All the animals were subjected to detailed ophthalmic examination and B-scan ultrasonograph...

ultrasonography is the only practical method for obtaining images of the posterior segment of the eye when the light-conducting media are opaque. in this study, 182 dogs with ocular abnormalities presented to the department of veterinary surgery and radiology from december 2008-august 2010 were included. all the animals were subjected to detailed ophthalmic examination and b-scan ultrasonograph...

Background: Contact lenses are transparent, thin plastic disks that cover the surface of the cornea. Appropriate lens prescription should be performed properly by an expert to provide better visual acuity and reduce side effects. The lens administration is a multi-stage, complex and time-consuming process involving many considerations. The purpose of this study was to develop a decision support...

In the article “Contact Lens-Assisted Collagen CrossInking (CACXL): A New Technique for Cross-Linking Thin Corneas” by Jacob et al.,1 the authors proposed a contact lens for extra protection of corneal collagen cross-linking (CXL) in thin corneas (range: 350 to 498 μm; mean: 377 μm). In their study, the treated corneas are protected by the contact lens and riboflavin (B2). I intend to provide a...

The lipid content in the eye lens was analyzed and compared among various species in this study. The eye lens lipids of the following species were investigated: cow, horse, duck, and freshwater trout. Additionally, the lipids derived from cataractous bovine lens and from cataractous human eye lens lipoprotein complexes were analyzed. The following lipid classes were detected in clear lenses: ch...

Two types of lenses can focus light: an optical lens using refraction phenomenon and a diffractive lens using diffraction phenomena. Table 1 shows the characteristics of each lens. The focal length of the diffractive lens is controlled by the structures of the lens, as mentioned in detail in Section 2.2. This suggests that the focal length of the diffractive lens is independent of refractive in...

This work deals with the near-field, sub-wavelength imaging of nanoscale objects using a thin silver film (near-field lens, NFL). As an example object, we consider a thin circular nanowire illuminated by a ppolarized plane wave. The simulation considers the coupling between the object and the lens and is based on the addition theorems of cylindrical and plane waves. We compare the realistic ima...