Conical contact lenses.

Contact Lens Visual Rehabilitation in Keratoconus and Corneal Keratoplasty

Keratoconus is the most common corneal distrophy. It's a noninflammatory progressive thinning process that leads to conical ectasia of the cornea, causing high myopia and astigmatism. Many treatment choices include spectacle correction and contact lens wear, collagen cross linking, intracorneal ring segments implantation and finally keratoplasty. Contact lenses are commonly used to reduce astig...

The study of Lysozyme adsorption onto 2-hydroxyethylmethacrylates and Silicon Hydrogel Contact Lenses

In order to increase the water content and the oxygen permeability of hydrogels used in themanufacture of contact lenses, the polar monomer Silicon Hydrogel Contact Lenses (SHCL), and 2-hydroxyethyl methacrylate (HEMA) were copolymerized with the hydrogels. Due to the presence ofpolar monomers in the conventional contact lenses, the major component of the human tear,lysozyme is extensively adso...

مشکلات و عواض ناشی از استعمال Contact Lenses

میزان استفاده و آگاهی دانش‌آموزان دبیرستان‌های دخترانه‌ی شهر زنجان از لنزهای طبی‌ _ رنگی در سال تحصیلی 1382

Background & objective: The aim of this study was to investigate the knowledge and use of contact lenses by high school female students in Zanjan in 2003. Materials & Methods: The designed questionnaire was randomly distributed among the high school female students. Then the questionnaire’s questions were standardized based on the study. The main sample size was 700. The samples were selected o...

The effect of polar copolymers in protein absorption on contact lenses on 2-Hydroxyethyl methacrylate(HEMA)

For the purpose of increasing the permeability to oxygen and equilibrium water content in contact lenses, polar copolymers with nonionic monomers such as 2-hydroxyethle methacrylate(HEMA) Is used. By adding the polar monomers to (HEMA), the permeability to oxygen and equilibrium with water content is increased and also the absorption of proteins on lens surface is changed. In this research, the...

بررسی کونژنکتیویت با پاپی های غول آسا وابسته به کنتاکت لنز در 700 بیمار

In view of the rapid expansion of contact lens amongst the users, new dimensions have been added to the domain of ophthalmology: Giant papillay conjunctivitis, a disease caused by different kinds of contact lens, appears weeks or months after they are used, although some patients are struck years later. The predominant symptoms are increased awareness of lenses, ocular itching, blurred vision a...