To characterize vestibulo-ocular reflex (VOR) properties in the time window in which contributions by other systems are minimal, eye movements during the first 50-100 ms after the start of transient angular head accelerations ( approximately 1000 degrees /s(2)) imposed by a torque helmet were analyzed in normal human subjects. Orientations of the head and both eyes were recorded with magnetic s...

In this paper, a new adaptive fuzzy reasoning method using compensatory fuzzy operators is proposed to make a fuzzy logic system more adaptive and more effective. Such a compensatory fuzzy logic system is proved to be a universal approximator. The compensatory neural fuzzy networks built by both control-oriented fuzzy neurons and decision-oriented fuzzy neurons cannot only adaptively adjust fuz...

Background and objective Aside from direct toxic effects, Sulfur Mustard (SM) induced serum hormone abnormalities may aggravate ocular complaints, including Ocular Surface Discomfort (OSD) (burning, itching, and redness), dry eye sensation, photophobia, blurred vision, foreign body sensation, and pain. The aim of the current study was to investigate the possible associ...

original article   to determine the association between ocular biometric components and near work in bank employees.this study was conducted as an analytical cross-sectional study. a group of bank employees and a control group were randomly selected. after applying the inclusion criteria, all selected subjects had a set of examinations including refraction, uncorrected and corrected visual acui...

purpose: to compare intraocular pressure (iop) readings measured by the ocular response analyzer (ora) with those measured by the goldmann applanation tonometer (gat) in keratoconic eyes following penetrating keratoplasty (pkp) and to evaluate the influence of anatomical and biomechanical properties of the grafts on iop measurements. methods: this cross-sectional study was conducted on 45 kerat...

objective(s): ketotifen fumarate (kf) is a selective and noncompetitive histamine antagonist (h1-receptor) that is used topically in the treatment of allergic conditions of rhinitis and conjunctivitis. the aim of this study was to formulate and improve an ophthalmic delivery system of kf.ocular nanoparticles were prepared with the objective of reducing the frequency of administration and obtain...

purpose: to determine the distribution of axial length (al), vitreous chamber depth (vcd), anterior chamber depth (acd), lens thickness (lt), lens power (lp), radius of curvature (cr), and white-to-white corneal diameter (wtw) in the 14-20 year age range methods: in a cross-sectional study, sampling was done from aligoodarz high schools using multistage simple cluster sampling. for all students...

purpose : ophthalmoplegia makes many physicians to refer the patients to neurologists and/or ophthalmologists for neuro-ophthalmic evaluation. ophthalmoplegia has different etiologies some of which may be very harmful and need urgent intervention. prevalence of the disease is not obvious. this study is designed to evaluate the various etiologies and their prevalence in this disorder. methods : ...