Keratoconus (KCN) is an ectatic disorder with progressive corneal thinning and a clinical picture of corneal protrusion, progressive irregular astigmatism, corneal fibrosis and visual deterioration. Other ectatic corneal disorders include: post-LASIK ectasia (PLE) and pellucid marginal degeneration (PMD). Corneal crosslinking (CXL) is a procedure whereby riboflavin sensitization with ultraviole...

The role of corneal biomechanical properties in patients referred to laser vision correction (LVC) is currently being raised. Understanding biomechanics may support the proper selection refractive surgery candidates, improve outcomes and safety procedures. Ocular Response Analyzer (ORA) Corvis ST are commonly used devices assess parameters LVC. vertical incisions have a greater impact on weaken...

PURPOSE To review cases of corneal ectasia after laser in situ keratomileusis (LASIK), identify preoperative risk factors, and evaluate methods and success rates of visual rehabilitation for these cases. DESIGN Retrospective nonrandomized comparative trial. PARTICIPANTS Ten eyes from seven patients identified as developing corneal ectasia after LASIK, 33 previously reported ectasia cases, a...

Scheimpflug photography is the basis for a variety of imaging devices that are highly versatile. The applications of Scheimpflug imaging are wide in scope, spanning from evaluation of corneal ectasia to quantifying density in nuclear sclerotic cataracts. The potential uses for Scheimpflug-based devices are expanding and a number of them are relevant in glaucoma. In particular, they can provide ...

Corneal ectasias include a group of disorders characterised by progressive thinning, bulging and distortion of the cornea. Keratoconus is the most common disease in this group. Other manifestations include pellucid marginal degeneration, Terrien's marginal degeneration, keratoglobus and ectasias following surgery. Advanced ectasias usually present with loss of vision due to high irregular astig...