Tropicamide is an antimuscarinic agent used as eye drops for refractive examinations. The aim of this study was to develop a simple and suitable analytical method for determination of tropicamide in eye drops in the presence of excipients. A zero-crossing third and fourth derivative spectrophotometric method was described for determination of tropicamide in eye drops. The measurements wer...

Traveling to high altitudes can expose the eye to reduced ambient cold and low-pressure environments. These conditions can affect the physiology of the eye and may result in ocular problems and visual disturbances. In this paper, ocular disorders related to high altitudes are briefly reviewed. Then, high-altitude ocular disorders are categorized in three parts: those related to dry and cold env...

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...

purpose: to detect the prevalence of dry eye after vitrectomy and its influencing factors. methods: schirmer i, tear basic secretion test and tear breakup time was done preoperatively and 3 months postoperatively on consecutive patients undergoing vitrectomy in khatam hospital from 2005 to 2006. eyes with previous peritomies of more than 120◦ and symptoms of dry eye or tear tests compatible wit...

sulfur mustard, a bifunctional alkylating agent, causes severe eye injury. the injury is a result of late inflammation, which is mediated by prostaglandins. theoretically, inhibition of prostaglandins by reagents such as indomethacine could result in alleviation of clinical adverse effects. in this study, the protective effect of topically applied indomethacine against sulfur mustard toxicity w...

this study was conducted to determine the use of three-dimensional ultrasonography (3du) in ocular imaging of the dog and measuring of its optical axis. 12 healthy mixed-breed dogs including 6 males and 6 females were studied. 3du of the eyes were done using a 5–12 mhz linear trapezoid transducer. 3du of the eyes were evaluated and the normal optical long axis through a line between the cornea ...

Background The current study aimed to determine eye care utilization, to assess the role of economic inequality in the utilization of eye care services, and to identify its determinants in Shahroud, North of Iran.   Methods Of the 6,311 invited people, 5,190 (82.24%) individuals aged 40 to 64 years old participated in the study. A history of a visit by an ophthalmologist or optometrist was cons...