Acute keratoconus is the term applied to the sudden development of a gross degree of corneal oedema in a patient with a pre-existing keratoconus. This rare condition was probably first described by Terrien (I906). An association between mongolism and acute keratoconus has recently been observed, the first two cases having been reported by Hoffmann (I956). Three cases (two bilateral) are reporte...

PURPOSE To determine the repeatability of corneal thickness measurements with Scheimpflug (Pentacam) and slit scanning (Orbscan) imaging techniques in different grades of keratoconus. METHODS This study was conducted as a cross-sectional research. Imaging with Orbscan and Pentacam was performed on patients with different grades of keratoconus. With each device, 3 measurements were taken at 10...

Reaction of 25,27-bis-(3-formylphenoxyethoxy)-p-tert-butylcalix[4]arene (1) with 20% mole of KCN in ethanol and i-propanol yielded monoethylester (2) (50%) and monoisopropylester (3) (15%). Compound 1 was not oxidized by air in the absence of KCN under reflux. The Cannizzaro reaction of 1 in ethanol using KOH gave bis-alcohol (4), acid-alcohol (5).

BACKGROUND Keratoconus normally presents as a sporadic disease. Although different studies have found sequence variants of the visual system homeobox 1 (VSX1) gene associated with keratoconus in humans, no research has detected such variants in sporadic keratoconus patients from China. To investigate the possibility of VSX1 being a candidate susceptibility gene for Chinese patients with sporadi...

WHY EARLY DIAGNOSIS? In corneal refractive surgery, early diagnosis of keratoconus (subclinical asymptomatic keratoconus) is of great importance in patients seeking surgery because it can prevent progression of the pathology after surgery and make it symptomatic (corneal ectasia), thus creating the need for diagnostic tests that provide high sensitivity (ability to detect the disease in affecte...

To investigate the mechanism of superficial stromal scarring in advanced keratoconus using confocal microscopy, the keratocyte density, distribution, micromorphology of corneal stroma, and SNP in three groups were observed. Eight corneal buttons of advanced keratoconus were examined by immunohistochemistry. The keratocyte densities in the sub-Bowman's stroma, anterior stroma, and posterior stro...

PURPOSE To compare the anterior and posterior corneal elevation maps between keratoconus-suspect eyes and normal eyes. SETTING Rothschild Foundation, AP-HP, University Paris VII, Hôpital Bichat Claude Bernard, Paris, France. METHODS The anterior and posterior corneal surface elevations were analyzed and compared in 60 normal myopic patients and 48 keratoconus-suspect patients. The anterior ...

Background: This study aimed to investigate the diagnostic value of pachymetry parameters measured by RTVueOCT for keratoconus. Methods: 74 patients with 118 eyes diagnosed with keratoconus were enrolled in keratoconus group and 60 patients with normal 120 eyes as health controls. Pachymetry parameters were measured. The major indicators were tested: 1) S-I value: difference between the mean su...

Purpose. The purpose of this study is to evaluate the vision related quality of life in patients with keratoconus by using the National Eye Institute Visual Function Questionnaire-25 (NEI-VFQ-25). Methods. Thirty patients presented with keratoconus (keratoconus group) and 30 healthy patients (control group) were included in this study. Twenty patients were using rigid gas permeable and 10 patie...