Astigmatism Flashcards
To learn and master the topic;
When the two principal meriedians are perpendicular to each other
Regular Astigmatism
When parallel rays of light enter the eye and do not come to a single point focus on or near the retina
Astigmatism
The sum of corneal astigmatism and residual astigmatism
Total Astigmatism
He is responsible for deriving the first diagnosis of astigmatism
Thomas Young
Give one example of distance chart for astigmatism
Clock Dial
Fan Dial
When the crystalline lens has a unequal curvature on the surface or on its layers
Lenticular Astigmatism
When the two principal meridians are not perpendicular to each other
Irregular Astigmatism
A type of clinical test in astigmatism that shows more reliable sources of information for cylinder power and axis
Retinoscopy
Give one sign of astigmatism
Decreased visual acuities at distance and near
When the cornea has unequal curvature on the anterior surface
Corneal Astigmatism
