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Biomedical subjects

N M Sergienko

Publications and source records attributed to N M Sergienko.

At least 19 recordsLinked to original sources
PubMed1990

[Arc-wedge keratoplasty as a method for correcting astigmatism].

In view of low effectiveness of optic correction of astigmatism a problem of its surgical correction becomes urging. A new operation for correction of astigmatism--arc wedge-keratoplasty, worked out by the authors, was made in 19 eyes with mixed and complex myopic astigmatism. Before operation the degree of astigmatism was, on the average, 6.8 +/- 2.11D (4.5-14.0), after operation--2.2 +/- 0.18D (0.18-5.5). The refractive effect made up, on the average, 4.6D (from 2.0 to 12.5). A change of a refractive power of the cornea was seen in both main meridians. The follow-up period ranged from 6 months to 4 years. The operation is highly effective and less traumatic than the known ones because only two notches are made and the central free zone not less than of 5 mm is preserved. A conclusion is made that operation of arc wedge-keratoplasty is advisable for correction of mixed astigmatism.

Astigmatism↗
PubMed1990

[A method of surgical treatment of progressive and complicated myopia].

The paper describes a modification of scleroplastic operation combining a vertical bandage with simultaneous covering of posteroexterior segment of the eye ball and creation of a "depo-tissue". As a grafting material, preserved human dura mater was used. By the proposed method, 97 operations were made in 67 patients with myopia from 6.0 to 32.0 D. In 30 patients, the surgical results were observed within 3 years. In all of the patients operated on, the stabilization of the process was recorded. The proposed modification is technically simple and accessible to a wide circle of ophthalmologists.

Adolescent↗
PubMed1990

[Crystalline lens alloplasty in childhood].

Alloplasty of the lens by means of the N. M. Sergienko's anteroposterior model of intraocular lens was made in 20 children, aged from 5 to 15 years, with traumatic or congenital cataracts. In 16 patients visual acuity after surgery was 0.3-1.0. In children, the postoperative period has some peculiarities, one of them being a longer course of postoperative uveitis with almost a 100% exudative reaction of different degrees. The N. M. Sergienko's anteroposterior model of intraocular lens can be effectively used for intraocular correction in children with traumatic and congenital cataracts, providing reliable fixation and producing no undesirable and specific complications for the construction.

Adolescent↗
PubMed1989

Correcting astigmatism.

Measurement of refraction in the principal meridians and off-axis meridians in both directions from the visual axis was undertaken. The extent of disagreement between the sine-squared law and the actual astigmatism of living astigmatic eyes was calculated. The corrected visual acuity correlates with the residual ametropia. The conoid of Sturm is not the same for each eye.

Astigmatism↗
PubMed1989

[The effectiveness of combining scleroplasty with ultrasonic activation of the filtering zone of the anterior chamber angle in progressive myopia].

A new method for treatment of progressive myopia is developed that includes simultaneous action on both components of the leading pathogenetic link of myopization: "intraocular pressure--durable properties of the sclera". The method includes a combination of sclera-enhancing operations (administration of auto- or allotissue into the sub-Tenon's space of the posterior segment of the eye) with microhypotensive action (ultrasonic activation of the filtration zone of the anterior chamber angle). A comparison of results after 30 operations of common retrosclerosealing with those after 30 operations of retrosclerosealing in combination with acoustic hypotensive action (the follow-up period--4 years) has shown that in patients with acoustic hypotension the level of intraocular pressure fell by 2.9 mm Hg, this being 1.2 mm Hg higher than after common retrosclerosealing. In case of common retrosclerosealing myopia progressed in 10% of patients and in its combination with acoustic hypotensive action further progression of myopia was not recorded.

Adolescent↗
PubMed1989

[Accommodative hyperemia of the ciliary body as one of the pathogenetic factors in myopia].

Thermometry of 40 eyes before and after visual work at near with different correction of ametropia and tonography of 20 eyes with progressive myopia and 20 eyes with stationary myopia conducted before and after 15-minute reading load under full correction have revealed that visual work at near is accompanied by working hyperemia of ciliary body (rise of temperature in the anterior segment of the eye ball) and hyperproduction of intraocular fluid. In eyes with stationary myopia, hyperproduction is fully compensated by improvement of aqueous outflow from the eye. In eyes with progressive myopia, ophthalmic hypertension takes place because of insufficient improvement of the outflow facility coefficient. It is likely that working hyperemia of the ciliary body and hyperproduction of intraocular fluid under conditions of visual work at near can be realized as a factor of myopization of the human eye in case of a certain predisposition: in eyes with a not fully formed angle of the anterior chamber or in eyes with anomalous development of the angle.

Accommodation, Ocular↗
PubMed1989

[Indications in radial keratotomy].

Some aspects of radial keratotomy are discussed. In particular, considerations on expediency of mass interventions from economic point of view are suggested. A question is discussed on necessity to conduct a wider information among population about possibilities and complications of radial keratotomy. Concrete indications and contraindications to radial keratotomy are listed.

Humans↗
PubMed1989

[The treatment of retinal vein thrombosis by puncture of the anterior chamber].

Repeated anterior chamber punctures in patients with old (more than one month) retinal vein thrombosis allowed to achieve a rise of visual acuity in 10 of 15 patients. In remote terms (after four months) further improvement of visual functions was recorded, visual acuity increased by 0.3-0.6 in 8 of 15 patients. In the process of treatment, no complications were observed. Repeated anterior chamber punctures can be recommended as a method of choice for treatment of this pathology.

Anterior Chamber↗