ABSTRACT
PURPOSE: Assessment of influence of of the cornea thickness decrease on intraocular pressure (IOP) measurements with Goldmann applanation tonometry in patients after refractive surgery procedures (PRK and LASIK). MATERIAL AND METHODS: 80 eyes in 40 patients (pts) qualified for myopia correction with laser surgery were divided into two groups: in Ist group--20 pts (40 eyes)--PRK procedure was performed and in IInd group--40 eyes (20 pts) LASIK was performed. IOP was measured by Goldmann applanation tonometry. The cornea thickness was assessed in its central region with endothelial microscope with pachymetric facility (Cooper Vision). The eyes were evaluated twice: before and 1 month after the procedure. RESULTS: In all eyes after laser surgery procedures IOP was lower because of the decrease of central cornea thickness. CONCLUSIONS: The central cornea thickness is an important factor influencing intraocular pressure measurements with Goldmann applanation tonometry. Refractive surgery procedures leading to the decrease of central cornea thickness result in lower intraocular pressure measurements in applanation tonometry.
Subject(s)
Cornea/anatomy & histology , Intraocular Pressure/physiology , Keratomileusis, Laser In Situ/methods , Adult , Cornea/surgery , Female , Humans , Male , Middle Aged , Postoperative PeriodABSTRACT
UNLABELLED: Corneal degeneration may differently impair visual acuity. Amniotic membrane grafts produce a favourable effect on the corneal structure and therefore they are used in the treatment of severe corneal degenerations. Amniotic membrane grafts can be used to cover conjunctival defects. THE AIM of this paper is to describe 3 cases of severe corneal degeneration manifesting in pseudopterygium in first-degree relatives who were treated with amniotic membrane grafts. MATERIAL AND METHODS: Six eyes in 3 patients (first-degree relatives) were studied. In 3 eyes (2 patients) pathological corneal lesions were removed, the conjunctiva was reconstructed and covered with amniotic membrane grafts. The follow-up period ranged from 9 to 16 months. RESULTS: The results of the above-mentioned procedure were very promising with respect to visual acuity, corneal structure (assessed by confocal microscopy) and alleviation of symptoms. CONCLUSIONS: Amniotic membrane grafts constitute a promising method for the treatment of severe familial corneal degeneration manifesting in pseudopterygium.
Subject(s)
Corneal Diseases/genetics , Corneal Diseases/pathology , Adult , Aged , Corneal Diseases/surgery , Female , Follow-Up Studies , Humans , Male , Middle AgedABSTRACT
PURPOSE: To assess changes of central cornea thickness after Excimer laser procedures--photorefractive keratectomy (PRK) and in situ keratomileusis (LASIK). MATERIAL AND METHODS: In 80 eyes of 40 patients the Excimer laser procedure was performed. Patients were divided into 2 groups: the 1st after PRK and the 2nd after LASIK procedure. Pachymetric measurements of cornea were performed before and 6 months after procedure. RESULTS: In both groups the thickness of the cornea was significantly lower after procedure. In the 2nd group the changes were greater. CONCLUSION: Excimer laser refractive surgery produces significant decrease in cornea thickness. The change in corneal thickness correlates with the change in spherical equivalent refraction.
Subject(s)
Cornea/anatomy & histology , Cornea/surgery , Keratomileusis, Laser In Situ , Refraction, Ocular/physiology , Adult , Female , Humans , Male , Middle Aged , Postoperative PeriodABSTRACT
PURPOSE: The aim of the study was to evaluate the state of anterior eye segment in postoperative period after PC-IOL transscleral fixation. MATERIAL AND METHODS: The material comprised 31 eyes in 31 patients, (11 women and 20 men), aged 20-80 years (average 61 years), who underwent the primary or secondary PC-IOL implantation with transscleral fixation. The examination was performed 10 to 14 months (average 12 months) after surgery. The clinical state of the corneas was evaluated using endothelial and confocal microscopy. The position of the IOL, its location and symmetry were evaluated with ultrasound biomicroscopy. RESULTS: The visual acuity ranged from 0.1 to 1.0. In 20 eyes (64%) the position of PC-IOL was correct. In the rest of cases the inappropriate position of implants was observed. The decrease of endothelial cells density was 13% in eyes with primary implantation and 7% in cases with secondary implantation of IOL. In the corneal endothelium, there were features of pleomorfism and polymegatism; in a few cases some deposits were observed. CONCLUSION: The implantation of posterior chamber intraocular lenses with transscleral fixation is recommended for some cases of primary or secondary problems with capsule support. The PC-IOL implantation with transscleral fixation can be the alternative method for the anterior IOL implantation.
Subject(s)
Anterior Eye Segment/surgery , Endothelium, Corneal/pathology , Lens Implantation, Intraocular/methods , Lenses, Intraocular , Postoperative Complications/pathology , Sclera/surgery , Adult , Aged , Aged, 80 and over , Cataract Extraction/adverse effects , Female , Humans , Male , Microscopy, Confocal , Middle Aged , Postoperative Complications/etiology , Time Factors , Tissue Fixation , Visual AcuityABSTRACT
PURPOSE: The aim of the study was to evaluate the blood flow in central retinal artery (CRA) in primary open angle glaucoma (POAG) and normal tension glaucoma (NTG). MATERIAL AND METHODS: Two groups of patients were examined: I group consisted of 15 patients (19 eyes) with POAG, II group of 16 patients (32 eyes) with NTG. The controls were age-matched healthy persons. Blood flow velocities and resistance index in central retinal artery were measured by DRG Retina-Doppler. RESULTS: We found decreased blood flow velocity in CRA in most of the patients with NTG and in part of the patients with POAG. Significant increase of resistance index was found only in NTG group. CONCLUSION: Our study confirmed that assessment of the blood flow in central retinal artery appears to be a valuable method in diagnosis of neuropathy mechanism in glaucoma.
Subject(s)
Glaucoma, Open-Angle/diagnosis , Retina/physiology , Retinal Artery/physiology , Female , Humans , Male , Middle Aged , Regional Blood Flow/physiology , Retina/diagnostic imaging , Retinal Artery/diagnostic imaging , Ultrasonography, Doppler, Color/methodsABSTRACT
PURPOSE: The purpose of the study was to evaluate the influence of Nd:YAG capsulotomy on the cornea structure assessed by scanning slit confocal microscopy. MATERIAL AND METHODS: 14 eyes in 14 patients after Nd:YAG laser capsulotomy performed 6-34 months after extracapsular cataract extraction with PCIOL implantation were observed. Structure of cornea layers was evaluated before the procedure, then 3 hours and 7 days after the laser exposition using confocal microscope. RESULTS: Initial evaluation showed degenerative changes in subepithelial plexus; 3 hours after the procedure excessive exfoliation of superficial epithelial cells was observed. No significant changes were registered 7 days after the procedure. CONCLUSION: No significant changes were found in the confocal microscopy images of cornea after Nd:YAG capsulotomy.
Subject(s)
Cataract Extraction/adverse effects , Cornea/pathology , Lens Implantation, Intraocular/adverse effects , Aged , Aged, 80 and over , Corneal Diseases/etiology , Corneal Diseases/pathology , Female , Humans , Male , Microscopy, Confocal , Middle AgedABSTRACT
UNLABELLED: The aim of the work is to evaluate the ocular functions in children and teenagers after IOL implantation. MATERIAL AND METHODS: The study included 51 eyes in 47 patients aged 6-20 years. IOL implantation was performed simultaneously with congenital or traumatic cataract surgery and in aphakia. RESULTS: The visual acuity 5/50-5/5 was achieved in 73.3% of eyes after congenital cataract surgery, in 76.5% of eyes after traumatic cataract surgery, and in 31% of aphakic eyes before implantation.
