Contact Glasses and Veiling.

Veiling Architecture Privacy in Loos and Le Corbusier

Derivation of veiling, visual extinction and excess flux from spectra of T Tauri stars

This work aims to analyse within a rigorous framework, veiling, visual extinction and excess extraction from the spectra of T Tauri stars. We investigate further the method of Hartigan et al. (1989) for veiling estimate from small spectral bandwidth of a few tens of Angstroms. The calculated veiling value is sensitive to the estimated noise ratio and to spectral mismatches between the object an...

Are people adapted to their own glasses?

Negative lenses, either in the form of glasses or contact lenses, can correct nearsightedness. Unlike contact lenses, glasses do not only correct, but also induce optic distortions. In the scientific literature, it has often been assumed that people who wear corrective glasses instantaneously account for these distortions when they put their glasses on. We tested this assumption and found that,...

بررسی تأثیر اعمال جراحی پیوند ثانویه عدسی داخل چشمی

Background and purpose : Many aphahic patients have unfavorable vision either with glasses or contact lens. In this study Visual outcome of Seconary (I.O.L) was implantation in aphakic patients referred to Imam Hossein Haspital 1994 evaluated. Materials and Methods : In a clinical trial with sequential sampling , 30 aphakic patients (26 males , 4 females mean of age 24.4 ± 10.8 years) who...

Observational Constraints upon Cool Disk Material in Quiescent Black Hole Binaries

We consider current observational constraints on the presence of cool, optically thick disk material in quiescent black hole binaries, specifically focusing on a case study of the prototypical system A0620– 00. Such material might be expected to be present theoretically, but is usually claimed to make a negligible contribution at optical and infrared wavelengths. The primary argument is based o...