PURPOSE To report calculated crystalline lens power and describe the distribution of ocular biometry and its association with refractive error in older Chinese adults. METHODS Random clustering sampling was used to identify adults aged 50 years and above in Xuhui and Baoshan districts of Shanghai. Refraction was determined by subjective refraction that achieved the best corrected vision based...

A simple optical lens plays an important role for exploring the microscopic world in science and technology by refracting light with tailored spatially varying refractive indices. Recent advancements in nanotechnology enable novel lenses, such as, superlens and hyperlens, with sub-wavelength resolution capabilities by specially designed materials' refractive indices with meta-materials and tran...

Cataract surgery due to advances in small incision surgery evolved from a procedure concerned with the primary focus on the safe removal of cataractous lens to a procedure focused on the best possible postoperative refractive result. As the outcomes of cataract surgery became better, the use of lens surgery as a refractive modality in patients without cataracts has increased in interest and in ...

In this paper, we propose a novel autostereoscopic dynamic simulation system in which a tablet PC and a fly’s eye lens are used. Dynamic simulation, which helps inexperienced physics students to understand the motion of objects intuitively, is one of the applications suitable for smartphones and tablet PCs. The reason is that an object displayed on the LCD can be moved toward a lower position b...

PURPOSE Phosphorylation is an important post-translational modification for the cellular regulation of various biosignaling pathways. We have identified in vivo phosphorylation sites of various lens proteins including especially the major structural proteins of the crystallin family from porcine eye lenses by means of two-dimensional gel electrophoresis (2-DE) or immobilized metal affinity chro...

Objective- Assessment of the lens anterior – posterior (AP) diameter as compared with the eye globe by ultrasonography in rabbit.   Design- Descriptive study.   Animals- 120 male and female rabbits, two months to four years old, and weighting between 300 to 1500gr.   Procedures- 2D ultrasonography of the eyes was performed and AP diameter of the eyes and lens were measured using Sonosite Tit...

Horn antennas can result in good impedance matching between the waveguide and free space due to the gradual increase in the aperture size. In this paper, a novel plasmonic sectoral horn nanoantenna based on using lens in the aperture is proposed. It is investigated that in addition to improvement of the directivity, the reflection coefficient is also reduced using the proper lens structure. The...

We investigate the possibility of determining mass distribution a gravitational lens via lensing observations. consider an extended, compact lens, representing its static external potential infinite set symmetric trace free (STF) multipole moments. Within wave-optical treatment, we evaluate caustics formed in lens's point spread function (PSF). study only quantity that is available astronomical...

Cataract is a major ocular disease that causes blindness in many developing countries of the world. It is well established that various factors such as oxidative stress, UV, and other toxic agents can induce both in vivo and in vitro cataract formation. However, a common cellular basis for this induction has not been previously recognized. The present study of lens epithelial cell viability sug...

The virtual confocal microscope method is used in microwave imaging to examine the biological tissues. The method depends on focusing the incoming scattered waves from a body to form an image using a virtual lens. A mathematical relationship is found that gives only the possible allowed values for the diameter of the lens for each specific wavelength, minimum required resolution and distance fr...