This is caused by an uneven surface of the cornea.
<h3>What is an uneven cornea?</h3>
Astigmatism occurs when light enters the retina unevenly due to the irregular shape of the cornea.
This condition can cause distorted or blurry vision, headaches, eye strain, eye irritation, or squinting.
Astigmatism can be inherited or developed later in life. An irregular corneal surface is common and can be caused by a variety of factors, including genetic inheritance, injury, disease, or natural occurrences.
The epithelium, bowman's layer, stroma, descemets membrane, and endothelium, which is the innermost layer, comprise the cornea.
A treatment called cornea collagen crosslinking may stop the condition from getting worse. Or your doctor could implant a ring called an Intacs under the cornea's surface to flatten the cone shape and improve vision.
True. The most successful was the Massachusetts Bay Colony, established by the Puritans... Source of information: http://thehistoryjunkie.com/new-england-colonies/
Darwin's greatest contribution to science is that he completed the Copernican Revolution by drawing out for biology the notion of nature as a system of matter in motion governed by natural laws. With Darwin's discovery of natural selection, the origin and adaptations of organisms were brought into the realm of science.
Herbert Spencer is famous for his doctrine of social Darwinism, which asserted that the principles of evolution, including natural selection, apply to human societies, social classes, and individuals as well as to biological species developing over geologic time
