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Biomedical subjects

J Lest'ák

Publications and source records attributed to J Lest'ák.

2 recordsLinked to original sources

[Eye injury from a paintball projectile].

A fourteen-year-old adolescent suffered after a direct hit with a plastic projective (paintball) a severe injury of the anterior and posterior segment of the eye manifested by intraocular haemorrhage, cyclodialysis, detachment of the retina with two giant tears and oedema and haemorrhages of the retina. After cerclage, pars plana vitrectomy and transient four-month tamponade with silicone oil the retina reattached. Late complications, cataract, broad anterior adherence with scars of the chamber angle and ciliary body, a lamellar defect of the macula and partial atrophy of the optic disc determined the subsequent development and were an indication for cataract surgery, implantation of an artificial lens into the lenticular capsule and reconstruction of the pupil. The final result was from the cosmetic and functional aspect (visual acuity 0.3) very satisfactory. Plastic projectiles (paintballs) are a new cause of severe eye injuries. At risk are in particular participants of games who do not protect their eyes with spectacles or masks. To save the function of the eye in unnecessary injuries frequently several operations are needed and close collaboration of surgeons for the anterior and posterior segment.

Adolescent↗

[Mariotte's spot].

The blind spot with 25 healthy persons (between 19 and 64 years of age) was examined by the Octopus instrument, program 62. The established size of the blind spot for the right visual field was: 14.6 degrees +/- 0.86 up to 18.6 degrees +/- 1.5 laterally from the place of fixation and 1.4 degrees +/- 2.2 up to 4.9 degrees +/- 3.5 under the horizontal line. The depth of the defects -93.6 degrees +/- 18.9 dB for the right visual field. The established size for the left visual field was 13.2 degrees +/- 1.5 up to 16.1 degrees +/- 2.5 laterally from the place fixation and 2 degrees +/- 3 up to 4.9 degrees +/- 3 under horizontal line. The depth of defects is for the left visual filed -99.2 +/- 15.5 dB. Statistically there was no evident difference of the size and depth of the defects of the blind spot (alfa = 0.01) either between the right and the left visual field or among the individual age groups. Physicians applying computerized static perimetry should know about the spatial characterization of the individual examination programs, of the physiological size and of the possible variations of the Mariott's Point and they should evaluate the correlation of all the quantities.

Adult↗