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Biomedical subjects

T Zeyen

Publications and source records attributed to T Zeyen.

46 records · Page 3Linked to original sources
PubMed1991

Multifocal IOL implantation: 16 cases.

We interpreted the clinical data from 16 eyes with a 3M multifocal implant and compared them with data from 16 monofocal implants with the same follow-up period. The multifocal implant has several disadvantages: a lower initial visual acuity, a higher frequency of posterior synechiae, and slightly more difficult ophthalmoscopy than with conventional lenses. The great advantage of the multifocal implant is the good near visual acuity without additional correction.

Adult↗
PubMed1991

Retinopathy of prematurity. Review of 7 cases.

A retrospective review of children with ROP, stage 2 or more, diagnosed between 24 April 1985 and 31 December 1990, is presented. The 7 patients had been born prematurely. The gestational age at birth ranged from 24 to 31 weeks. Their birth weight was less than 1430 g. Spontaneous evolution and evolution following cryotherapy are described. The follow-up period ranged from 2.5 to 30 months.

Birth Weight↗
PubMed1990

VISTECH contrast sensitivity and pattern-VEP in multiple sclerosis patients.

In 12 known multiple sclerosis patients with a visual acuity of 7/10 or better in both eyes, optic nerve function was tested by means of contrast sensitivity measurement (VISTECH technique) and pattern-VEP. The results were compared with those of an age related control group. The VISTECH contrast sensitivity measurement is a useful tool in evaluating the remaining visual discomfort after the resolution of an optic neuritis. However, to detect a subclinical optic neuritis, the pattern-VEP is more sensitive.

Adult↗
PubMed1989

A new universal electrode for ERG recording.

The authors introduce a contact lens for flash and various pattern ERG's. The main properties are: annular shape, blepharostatic effect, central opening. The electrode is well tolerated and sterilisable.

Contact Lenses↗
PubMed1989

Predictability of surgery on non-accommodative esotropia.

The aim of the present retrospective study is to determine those clinical parameters which could be helpful on the predictability of postoperative outcome on non-accommodative esotropia. We could conclude that our results are similar to those previously described in the literature, although we could not find any new guidelines, which could predict the postoperative alignment.

Age Factors↗
PubMedDate not supplied

Screening for glaucoma in a general population with the non-mydriatic fundus camera and the frequency doubling perimeter.

PURPOSE: To evaluate the usefulness of non-mydriatic fundus camera (NMFu-camera) and frequency doubling perimeter (FDP) for detecting glaucoma in a general population. METHODS: This prospective observational multicenter study consisted in screening for glaucoma in the populations of three Belgian cities. Intraocular pressure (IOP) was measured with non-contact pneumo-tonometer (NCT) and applanation tonometry (AT) if NCT IOP was > or = 17 mmHg. Visual field was screened with FDP (C-20-5) and digitized optic disc photographs (ODPs) were taken with NMFu-camera. FDP was considered abnormal if at least one defective point was found. ODPs were graded as normal or glaucomatous by consensus of three glaucoma specialists. Optic disc and visual field results were matched per eye. Subjects with known ocular hypertension and/or treated primary open angle glaucoma were excluded from the analysis. RESULTS: A total of 1620 subjects were included in the study. Their mean age was 63.2 years. AT IOP was > 21 mmHg in 8.2%. A total of 98.1% of ODPs could be interpreted. Glaucomatous optic discs were detected in 3.5% of the subjects. In this group only 24% had an AT IOP > or = 22 mmHg. FDP was abnormal in 44.5%. The sensitivity and specificity of FDP to identify patients with an optic disc graded as glaucomatous were 58.6% and 64.3% respectively. CONCLUSIONS: The combined use of the NMFu-camera and the FDP is a feasible method for an initial glaucoma mass screening. NMFu-camera may be a useful and quick method to screen for glaucomatous damage in a community. FDP in screening strategy was revealed to be not sensitive enough when setting the cut-off value at one defective test location. IOP measurements were confirmed to be a poor tool to detect glaucomatous damage.

Adult↗