purpose: to determine the prevalence and causes of blindness and low vision in yazd provice in 2008. methods: a population-based cross-sectional study was performed on inhabitants of in yazd province in 2008. using multistage cluster sampling, sample size was calculated based on the distribution of the total population of yazd province derived from national census and estimated rates of blindne...

background: adverse effect of sun rays mainly uv ray on the human eye documented and protection of eyes is necessary using different methods such as, sun glasses. sunglasses are designed in different colors. the aim of this study was evaluation of the effect of different colors of sunglasses on the visual acuity, contrast sensitivity, stereopsis and color vision. methods: 81 normal subjects wer...

The northern scenic area of Changbai Mountain is a high-incidence debris flow disasters, which seriously threaten the safety tourist’s lives and property. Monitoring providing early warning critical for timely avoidance. change source an effective way to predict flow, can be reflected in settlement deformation study area. offset tracking technique (OT) insensitive coherence SAR images resist de...

abstract planting of olive (olea europaea l.) tree due to salt and drought tolerance and ever green habit increasingly is considered in urban landscape in recent years. the low resistance to cold has been a major problem in using this tree in temperate and cold zones. so, determination of frost resistance cultivars is one of the important measures for use of this tree in urban landscape. to eva...

objectives: talking about needs, it means to consider the reasons of human behavior. because such behavior starts with one or several needs which will cause to develop different societies according to the degree of civilization, and also social-cultural factors treat differently with blinds, so these different circumstances can create different needs and motivation for them. methods: on this ba...

purpose: to determine the prevalence and causes of blindness and low vision in tehran province in 2005. methods: a population-based cross-sectional study was carried out involving all habitants living in tehran province in 2005. the study design was according to the world health organization recommendation methods and also a pilot study preformed among rural and urban areas of karaj. it was a m...