AIM To determine the possible relation between intraocular pressure (IOP), central corneal thickness (CCT) and corneal resistance (CR) in kerotoconic eyes before, 3,6 and 12 months after collagen crosslinking procedure (CXL) with aim to find out does the thicker cornea means already more resistance cornea followed with higher IOP. METHODS Thirty eyes (30 patients) with central keratoconus (KC...

purpose: to evaluate corneal hysteresis and corneal resistance factor in penetrating keratoplasty grafts in a group of keratoconic eyes using the ocular response analyzer (ora) and to evaluate the relationship between donor size, donor-recipient disparity and central graft thickness (cgt), and ora parameters. methods: this cross-sectional study was conducted on 34 eyes of 34 keratoconus patient...

PURPOSE To explore the potential effect of ageing on the corneal curvature and corrected visual acuity in patients with long-term keratoconus because of the paucity of these patients older than 50 years. METHODS Records of keratoconic patients, who had initially presented to a specialized contact lens clinic and followed for more than 20 years after disease onset, were reviewed. Collected inf...

in this research, we investigated basic symptoms of syndrome in illnesses of sick buildings. we designed a questionnaire and asked from male of dormitory residence. questions of the questionnaire were more about known symptoms of buildings (shortness of breath, inflammation, swelling and burning eyes, runny nose, malaise and fatigue, drowsiness, headache) exacerbations time intervals in the res...

Collagen cross-linking (CXL) is being offered to a growing number of keratoconic patients worldwide for prevention of disease progression, with an overall success rate that exceeds 90% of the treated eyes.1,2 However, some patients do continue to progress after CXL and may need to undergo keratoplasty. Deep anterior lamellar keratoplasty (DALK) has become the preferred technique by an increasin...

background: astigmatism is the leading complication in visual recovery after penetrating keratoplasty (pkp) and deep anterior lamellar keratoplasty (dalk); in this study, we evaluated the outcome of femtosecond laser arcuate keratotomy (flak) after dalk and pkp in iranian keratoconic patients. materials and methods: in this prospective interventional case series, refractive and keratometric pre...

Keratoconus is an ectatic disease in which the cornea develops a conical shape due to thinning of the collagenous corneal stroma. Characteristic morphological features seen on slit lamp examination are well described. This overview describes the recent advances in our understanding of keratoconic pathology, focussing particularly on the matrix metalloproteinase hypothesis of keratoconus disease...

PURPOSE To search for gold-standard histology indicators using alternative imaging modalities in keratoconic corneas. METHODS Prospective observational case-control study. Fourteen keratoconic corneas and 20 normal corneas (10 in vivo healthy subjects and 10 ex vivo donor corneas) were examined. Images of corneas were taken by spectral domain optical coherence tomography (SD-OCT) and in vivo ...

Keratoconus, a dystrophy of unknown origin, remains an ophthalmic enigma. The contrast between the presence of marked structural changes and deformation of the corneal wall and the relative absence of specific genetic and biomolecular findings continues to intrigue ophthalmologists. In Marfan syndrome, where genetic and molecular abnormalities are well identified, and similar changes in collage...