Search PubMed⌕ Search

Biomedical subjects

M D Sarver

Publications and source records attributed to M D Sarver.

35 records · Page 2Linked to original sources
PubMed1977

Patient response to thin hydrogel contact lenses.

This study was designed to evaluate the patient response to experimental Bausch & Lomb thin F series SOFLENSES. The center thickness of these lenses was 0.04-0.06mm compared to 0.14-0.16 mm for the conventional F series lenses. Eight of the twenty-three subjects fitted (35% of the patients, 39% of the eyes) were successful by the standard of Sarver, Harris and Polse. The principal reason for failure was discomfort, which was often associated with poor centration and arcuate staining. Neither vertical corneal striae nor significant corneal thickening were observed during the eight hour wearing periods. Lens handling was a major problem. During the eight weeks of the study 35% of lenses used were torn. Our results indicate that even though thin F series SOFLENSES cause less corneal edema than conventional F series SOFLENSES, the overall patient response to these thin lenses is less favorable than the response to conventional SOFLENSES. Further research with thin hydrogel lenses is needed to determine if the patient response can be improved by altering such lens parameters as diameter and/or curvature.

Adult↗
PubMed1976

Apical bearing and success with the Bausch and Lomb Soflens (polymacon) contact lens.

Thirty-three patients (63 eyes) were fitted with Bausch and Lomb soflens (polymacon) contact lenses. The initial lenses were selected with the mean posterior apical radius 0.45 mm flatter than the flat keratometer reading of the cornea (S.D. = +/-0.31 MM). Forty-eight eyes (76%) were successfully fitted and 15 eyes (25%) were unsuccessfully fitted. Among the successfully fitted eyes, 31 were fitted with the initial lens, 12 required steeper lenses, and 5 required flatter lenses. The final successfully fitted lenses were on the average 0.40 mm flatter (S.D. = +/-0.32 mm) than the flat keratometer reading of the cornea. The unsuccessfully fitted lenses were not significantly different than the successfully fitted lenses, being 0.47 mm flatter (S.D. = +/-O.32 mm) than the flat keratometer reading of the cornea. Although the central lens-cornea relationship is helpful in fitting the Soflens, the number of successful results are increased significantly by changing to a lens with different parameters when lens performance and patient response are not optimal.

Adolescent↗
PubMed1976

The visual Rx.

Explore the source record for details and available documents.

Contact Lenses, Hydrophilic↗
PubMed1975

Corneal edema and vertical striae accompanying the wearing of hydrogel lenses.

Changes in corneal thickness and the ocurrence of vertical striae were monitored on 27 patients who wore both the "F" and "N" series Bausch and Lomb Soflens-TM (polymacon) contact lenses. Changes in corneal thickness were observed with both lenses; however, the "N" series lens caused slightly more corneal swelling. Vertical striae occurred in about 50% of the patients and was correlated with the development of corneal edema. In most cases where significant corneal edema was measured, it was possible to observe the edema using the biomicroscope.

Adult↗
PubMed1975

Corneal curvature and refractive error changes associated with wearing hydrogel contact lenses.

To determine if there are corneal curvature and refractive error changes associated with hydrogel lens wear, 27 patients wearing F series Bausch & Lomb SOFLENS-TM contact lenses were examined regularly for nine months. During the first month of lens wear, a mean corneal steepening of 0.23 DK plus or minus 0.18 and an increase in with-the-rule toricity were found, which persisted during the following eight months of wear. A mean increase in myopia of 0.35 DS plus or minus .211 DS was found after nine months of lens wear for five randomly selected patients. This amount of change was statistically significant and was highly correlated with the observed corneal steepening. Their lenses were removed after nine months of lens wear. Both corneal changes and the increase in myopia persisted during the 14 days after lens removal. If long term studies with larger samples show similar results, the effect of hydrogel lenses on corneal curvature and refractive error will have to be considered in the decision to fit this type of lens.

Adult↗
PubMed1975

Corneal curvature and supplemental power effect of the Bausch and Lomb SOFLENS contact lens.

The supplemental power effect (SPE) of F series Bausch and Lomb SOFLENS (polymacon) Contact Lenses was determined for a sample of 54 eyes. The mean value was +0.34 D=S.D.+/-0.37 D, range zero to +1.00 D. A significant correlation was present between the SPE and the apical lens-cornea bearing relationship. (p less than 0.01). The results of this study provide refractive evidence that a central lens-cornea alignment is achieved when the posterior apical radius of the lens is about 0.5 mm flatter than the flat radius of the cornea, S.D.+/-0.35 D. This information is clinically useful in assessing the patient's visual response as well as the fit of the lens.

Adult↗