Biomedical subjects

T Kubĕna

Publications and source records attributed to T Kubĕna.

8 recordsLinked to original sources

PubMed2004

[Influence of intracranial pressure decrease in the pseudotumor cerebri syndrome on visual function].

Authors describe ocular and neurological findings in a 68 years old female patient with the intracranial hypertension (pseudotumor cerebri). For developing edema of the optic nerve head on the fundus (oedema papillae), accompanied with lowered visual acuity and visual field defects, an urgent surgical treatment was indicated--the lumboperitoneal shunt was introduced. After the operation, although the atrophy of the optic nerve head atrophy occurred, the visual acuity was maintained and visual fields sensitivity improved.

Aged↗

PubMed2002

[Effect of TLT absorptive eyeglasses on progression of myopia in children].

The incidence of myopia is increasing worldwide. At the last VIIIth international conference on myopia held in June 2000 in Boston attention was aroused by the work of Quin et al. on the influence of noctural illumination in rooms where children slept on their subsequent development of myopia. Our working hypothesis presented in Hakone in 1996 presumes also a negative effect of light and heat which initiate the development of myopia but on eyes with an inborn disposition. We considered as a solution wearing spectacles with glass which allow to penetrate only visible light and absorb the other wavelengths. These glasses were supplied by Karel Kubĕna-TL Technologies. The authors followed up for four years two groups of children with progressive myopia. The progression of myopia during the first two years of the follow up was almost identical in the two groups: in the group with the absorption glasses 0.75 D/year and in the control group 0.77 D/year. After two years of wearing the absorption glasses the progression in the group with the absorption glasses was 0.34 D/year and in the control group 0.59 D/year.

Adolescent↗

PubMed2001

[Clinical features and therapy of giant cell temporal arteritis].

Giant-cell temporal arteritis is an urgent condition in ophthalmology as successful treatment depends on early diagnosis and effective therapy before the development of ophthalmological symptoms. The authors investigated on a long-term basis five patients. In the first one complete regression of general and ocular symptoms occurred and vision was preserved. The second patient was admitted already with loss of vision of one eye and despite intensive treatment it did not prove possible to save vision of the second eye. The third patient developed, after clinical recovery, a relapse which was again brought under control. In another patient of relatively younger age it proved possible to arrest the progress of the disease without loss of vision. In the last patient visual acuity improved after treatment.

Aged↗

PubMed2000

[Methods in optic nerve disk digital planimetry].

The authors define the term planimetry in general and planimetry of the optic disc in particular and present a brief review of the history of planimetric evaluation of the optic disc. They describe a digital analyzer of their own design, the method of examination of the optic disc and further processing and recording of data. They define the indications and contraindications of examination, summarize the asset and limitations of the method used. The authors examined so far by digital planimetry 1575 optic discs of 856 patients.

Humans↗

PubMed1999

[Effect of infrared rays on the eye in progressive myopia].

In the submitted paper the authors pay attention to infrared radiation close to visible light is intensely absorbed by haemoglobin, melanin and xanthophyll whereby part of the radiation energy is transformed into heat. The authors present three series of experiments where they investigated by different methods changes in the vitreous body after exposure to light, infrared radiation or raised temperature. They assume that on the defocused eye with a myopic conus which developed as a result of an inborn inadequate closure of the optic cup the light can cause a rise of temperature in the vitreous body. This leads to metabolic changes characterized by increased activity of lysosomal enzymes causing loss of the spatial structure of hyaluronic acid and collagen biomolecules. Penetration of the altered vitreous fluid thought the conus can lead to degradation of the interstitial substances of the sclera. Suitable absorption glasses filtering infrared light close to visible light could reduce the hyperthermia of the vitreous body.

Humans↗

PubMed1999

[The optic nerve disk in myopic children with elevated intraocular pressure].

The optic nerve disc of short-sighted children with elevated intraocular pressure was investigated to achieve early assessment of glaucoma and to detect signs which differentiate changes in the disc caused by short-sightedness from changes caused by glaucoma. The authors examined 16 eyes of 8 short-sighted children with elevated intraocular pressure. In addition to the basic ophthalmological examination they made a digital analysis of the optic nerve disc incl. planimetric evaluation of the dimensions of the disc, excavation and the neuroretinal rim. In two patients despite the higher intraocular pressure the area of the rim was supraliminal. In three patients the narrower area of the neuroretinal rim increased the probability of glaucoma In two patients with anisometropia on the eye with greater myopia the intraocular pressure was higher and the neuroretinal rim narrower as compared with the other eye. In one patient the area of the rim was very narrow and the diagnosis of glaucoma was confirmed also by arcuate scotoma in the lower part of the visual field corresponding to the narrow rim on top.

Adolescent↗

PubMed1998

[Visual perceptions in ophthalmic migraine].

The number of patients with ophthalmic migraine is steadily increasing. The symptoms of their attacks are dominated by typical visual aura, followed by major or minor headache. The authors present the experience of three physicians who observed the symptoms on themselves. The first one has suffered from the disease already for fifty years, the second and third one 25 years each. In the discussion the authors deal with the differential diagnosis of the disease and its possible treatment.

Aged↗

PubMed1998

[Functional disorders of the visual field].

The author describes a group of 12 patients with concentric narrowing of the visual field which was not elucidated, with the exception of one patient, even after all indicated clinical and paraclinical examinations. He describes diagnostic methods providing evidence of the functional character of the impaired visual field and presents typical findings of changes of the visual field in functional disorders.

Adolescent↗