corneal astigmatism

No strong relationship has been found between long-term contact lens wear and corneal astigmatism.

CorT is also an accurate and reliable way of measuring irregular corneal astigmatism.

Defective vision occurs due to marked corneal astigmatism.

Preoperative measures also are used to set a target for corneal astigmatism that minimizes total astigmatism after surgery.

Until now we have been talking about corneal astigmatism, but another form of astigmatism is lenticular astigmatism.

The Alpins Method enabled a corneal astigmatism analysis to be performed even where treatment parameters were based on refractive values.

The Alpins Method has become an accepted standard worldwide for reporting the results of studies that include refraction and corneal astigmatism measurements.

CorT provides the most reliable orientation of the steep meridian and the most effective magnitude of the corneal astigmatism.

This difference can be quantified by calculating the vectorial difference between refractive and corneal astigmatism, and is known as the ocular residual astigmatism (ORA).

LRI is used to reduce corneal astigmatism by placing a pair of incisions of a particular depth and arc length at a steep axis of corneal astigmatism.

Alpins and Stamatelatos found a greater reduction in corneal astigmatism and better visual outcomes under mesopic conditions using wavefront technology combined with vector analysis (the Alpins Method) than using wavefront technology alone, and also found equivalent higher-order aberrations.

Alpins believes that the pathway to "super vision" requires a greater customized reduction of corneal astigmatism than is usually attempted, and that any remaining astigmatism ought to be regular (as opposed to irregular), which are both fundamental principles of vector planning overlooked by a purely wavefront-guided treatment plan.