Search PubMed⌕ Search

Biomedical subjects

I Gurevich

Publications and source records attributed to I Gurevich.

79 records · Page 5Linked to original sources
PubMedDate not supplied

[Effect of optic aberrations, caused by ablation pattern decentration after laser vision correction, on visual acuity].

The aim of this work was to study the effects of subclinical ablation pattern decentration on the quality of vision after photorefractive laser surgery. Optical high order spherical and coma-like aberrations of 30 eyes were evaluated before, 1 and 3 months after photorefractive surgery (PRK and LASIK). Relationship between the size and shape of the light spot on the retina during transmission of paraxial beams through the eye and the ablation zone decentrations was estimated. The results are presented for pupil diameters of 1 and 6 mm both at the center of the retina along the optical axis and at a distance of 0.5 mm from the center. Decentration of ablation zone by less than 1 mm makes the principal contribution to induction of higher order aberrations. The relative increase factor is 3.9 and 5.1 for the coma-like and spherical aberrations, respectively. At such decentrations spatial resolution of the eye decreases as the pupil size increases, which is most pronounced even at a slight distance from the visual axis but inside the fovea.

Corneal Injuries↗
PubMedDate not supplied

How to handle blood and body fluids.

Blood and body fluids and Universal Precautions have become part of the everyday vocabulary in health care. How body fluids are handled by individuals depends on their perception of risk for acquiring an infection from these substances and is not always based on sound knowledge. An understanding of how infections are acquired and the role of blood and body fluids as part of the risk is necessary if nurses and others are to use appropriate precautionary measures. Those parameters are discussed in this article.

Centers for Disease Control and Prevention, U.S.↗