Astigmatism affects how the eye focuses light. In a normal eye, the cornea and lens at the front of the eye are round and evenly curved, like a basketball. However, in an eye with astigmatism, the cornea or lens is irregularly shaped, like a football or rugby ball. This causes light t...
Astigmatism affects the shape of the cornea; rather than being shaped “normally” like a baseball, astigmatism causes the cornea to more closely resemble the shape of an American football or an egg. Because of this, light is processed differently through the eye. This is where a specific asti...
For patients with less than 1.5 diopters of astigmatism and using a technique which is known to induce little astigmatism, the wound can be placed wherever it is most comfortable for the surgeon. It must be remembered that, if training is taking place, the training surgeon must be in a posi...
Astigmatismis attributed to the unequal meridional curvatures ofocularrefractive surfaces of the cornea and/or lens, causing blurred vision at any distance.106In human eyes,astigmatismconstitutes approximately 13% of refractive errors102and affects 23%–58% of children in Asia and 28% of children in...
[15]. Understandably, as residual astigmatism increases, uncorrected distance visual acuity worsens. Notably, the impact of multifocal IOL implantation on this relationship was found to be not statistically significant. Berdahl et al. [15] demonstrated that residual astigmatism affects visual acuity ...