Search PubMed⌕ Search

Biomedical subjects

M Belkin

Publications and source records attributed to M Belkin.

At least 181 records · Page 10Linked to original sources
PubMed1982

Aphakic ultrasonographic refraction in adults. Comparison with retinoscopy and subjective refraction.

A simple method of aphakic refraction using ultrasonographic axial length measurement and keratometry was tried on 97 eyes of adult aphakic patients. The refractive errors determined by this method and by retinoscopy were compared to the subjective refraction of the same eyes. The ultrasonographically determined refractive errors were significantly nearer the subjective refraction than were the retinoscopically determined refractive errors.

Aged↗
PubMed1980

The laser hazard.

Explore the source record for details and available documents.

Eye Injuries↗
PubMed1979

Management of nonmagnetic intraocular foreign bodies: a new approach with the aid of diagnostic x-ray spectrometry.

A new approach is suggested for the management of nonmagnetic intraocular foreign bodies. This approach is based on diagnostic x-ray spectrometry, which is capable of detecting noninvasively the dissolution of metallic intraocular foreign bodies. As long as no copper dissolution is observed, foreign bodies of reasonable size are left in the eye and extraction is recommended whenever a persisting copper dissolution is detected. Of the 32 patients examined and followed up, 23 did not show any copper dissolution. The majority of these patients, one of whom has retained a foreign body for 28 years, have satisfactory visual functions. Of the nine patients in whom copper dissolution was observed, five were operated on. In three of the remaining four patients, the operation was delayed and the dissolution was found to be temporary. These patients retained good visual functions.

Adolescent↗
PubMed1978

Experimental chalcosis: a comparison between in vivo and in vitro findings.

The ocular changes following the introduction of a copper foreign body in the eye of rabbits were studied by histological, histochemical, and quantitative analysis. The findings are compared with previously reported changes observed in vivo. The efficacy of ophthalmoscopy and electroretinography in the early detection of chalcosis is compared with the efficacy of a new method, diagnostic X-ray spectrometry.

Animals↗
PubMed1978

Explosive intraocular foreign bodies.

We examined two patients, each with a foreign body composed of smokeless gunpowder in the vitreous body of one eye and multiple similar foreign bodies in the eyelids, conjunctiva, and cornea. No damage to the eye was caused by the retention of these foreign bodies for over three years in one case and two years in the other. The composition of these foreign bodies appeared to be nontoxic to the eye and thus, extraction of the foreign bodies did not seem to be necessary.

Adult↗
PubMed1978

A noninvasive method for the evaluation of tissue iron deposition in beta-thalassemia major.

DXS, a noninvasive method for the analysis and quantitation of trace elements in different tissues, was applied to quantitate the degree of iron overload in the skin of 19 patients with beta-thalassemia major. The duration of the test is short, it is not associated with inconvenience to the patient, and it can be repeated at different times at different locations on the outer surface of the body. In patients who receive numerous repeated blood transfusions, there was a close correlation between the dermal iron content and the rate of transfusions when they exeeded 6 units of packed RBC per year. In three patients with the spleen in situ, the dermal iron content was lower than in corresponding splenectomized patients. The rate of dermal iron accumulation was found to be similar to the rate of iron deposition in the liver, as assessed in a similar group of patients by repeated liver biopsies. The monitoring of the degree of iron accumulation in individual patients as a function of time and the effect of treatment with iron chelating agents can be determined noninvasively with the aid of DXS.

Blood Transfusion↗
PubMed1977

Ultrasonographic refraction of aphakic infants and children.

A simple method of aphakic refraction using ultrasonographic axial length measurement and corneal curvature determination is presented. This method was compared with skiascopy in refraction eleven eyes of aphakic infants. No significant differences were found between the relative errors measured by these two methods.

Cataract Extraction↗
PubMed1977

Effect of visual environment on refractive error of cats.

33 eyes of 18 cats raised in cages or in small rooms under conditions of near vision were compared with 22 eyes of 11 street cats. Refraction of the caged cats showed that three quarters of them were myopic (average:-0.8 D) while 87.5 percent of the street cats were hypermetropic (average: +1.4 D). The antero-posterior diameter was practically equal in both groups (20.4 mm) and in both myopic and hypermetropic eyes. The site of the permanent refractive changes is suggested to be the lens.

Animals↗
PubMed1977

Noninvasive copper measurement in chalcosis: comparison with electroretinography and ophthalmoscopy.

The developement of chalcosis bulbi in rabbits' eyes is investigated by ophthalmoscopy, electroretinography, and diagnostic x-ray spectrometry (DXS), a new method for in vivo analysis and quantitation of metals. The DXS is shown to provide an effective method for the early detection of intraocular foreign bodies (IOFB) dissolution. The ophthalmoscopic changes observed in chalcosis are discussed in relation to dissolution of IOFB and electroretinographic findings.

Animals↗