Biomedical subjects

L C Locke

Publications and source records attributed to L C Locke.

5 recordsLinked to original sources

PubMed1992

Ocular manifestations of hypertension.

Systemic hypertension is a highly prevalent clinical condition encountered in optometric practice on a daily basis. Hypertension produces, both directly and indirectly, a variety of ocular manifestations for which the patient may seek optometric care, or which may be detected by the optometrist during the course of examination. Determination of the patient's blood pressure status through thorough history taking and patient examination, including in-office sphygmomanometry screening, offers a tremendous opportunity for holistic optometric care that has a positive impact on patient longevity and quality of life. This review of hypertensive fundus changes provides an in-depth historical perspective of the ocular manifestations of systemic hypertension, the current clinical and basic research thinking on the pathophysiology of observed hypertensive ocular changes and its appropriate documentation, and the clinical application of this important information in the primary care optometric setting.

Eye Diseases↗

PubMed1990

Sector pupillary dilation: an alternative technique.

Sector pupillary dilation is a method for controlled delivery of topical ophthalmic adrenergic agonists to stimulate the dilator muscle focally in patients predisposed to pharmacologically induced acute angle-closure glaucoma. Sector pupillary dilation can be achieved by applying a sterile cotton-tipped applicator moistened with 2.5% phenylephrine ophthalmic solution at the 6:00 o'clock limbus. A pilot study (N = 2) was conducted of one blue-eyed subject (M, age 38 years) and one brown-eyed subject (F, age 36 years) using drug contact times of 5 to 30 s in 5-s intervals. The horizontal and vertical pupil diameters were measured using photographs taken every 10 min for 1 h and every 20 min for the second hour. Sector pupil dilation developed with all application times. For the blue-eyed subject maximum sector dilation (delta = V-H = 1.5 mm) occurred with a 20-s contact time and peaked after 40 min. For the brown-eyed subject, the sector dilation effect was less marked and did not demonstrate a clear-cut peak time.

Adult↗

PubMed1989

A comparison study of dynamic retinoscopy techniques.

The dynamic retinoscopy technique that has undergone the most quantitative study is the Monocular estimate method (MEM). For reasons of examiner preference, patient cooperation, or equipment availability it may be useful for the practitioner to have alternative methods available to assess accommodative status. The purpose of this study was to compare data obtained by two experienced examiners using Bell, Cross, and Nott retinoscopies, MEM and Binocular cross cylinder (BCC) to evaluate accommodative lags of 10 young adult subjects. Statistical analysis revealed no significant differences between the results of the two examiners (p less than 0.2672). Results obtained by the MEM, Cross, and Nott techniques were not significantly different, but those obtained by Bell and BCC were significantly different from the other three techniques. The results of this study suggest that an examiner may use MEM, Cross retinoscopy, or Nott retinoscopy interchangeably to evaluate accommodative lag of the young adult subject.

Accommodation, Ocular↗

PubMed1989

Analysis of a community vision screening program.

For 3 consecutive years a community vision screening program has been conducted on-site at the Walker Eye Clinic of the Indiana University (IU) School of Optometry. A group of 490 screened patients, including 86 who returned for comprehensive evaluation, was retrospectively studied for a variety of characteristics. It was determined that the typical participant was likely to be an adult female who learned of the screening program through the written media. She was likely to have had a previous vision examination but it probably took place 3 or more years earlier. She usually failed the vision screening for reasons of reduced visual acuity, a problem with binocularity or asthenopia. If she returned to the Walker Eye Clinic for a comprehensive examination, she was likely to do so within 5 months and would be found to have been accurately identified as being in need of vision care. The organization and implementation of this vision screening program are described, and its value as an educational tool for students of optometry and its technician program is discussed.

Adolescent↗

PubMed1987

Conjunctival abrasions and lacerations.

Although less commonly described in the ophthalmic literature, conjunctival injuries may be encountered by the primary care practitioner on a frequent basis. Both conjunctival abrasion and laceration are described in detail, including their diagnosis, treatment and management.

Adolescent↗