Local, regional, and statewide news continually updated from thousands of sources on the web. Tell me when there are new stories. DPS investigating Thursday morning fatality in Yoakum County.
An eyespot, often called a stigma (derived from Greek for spot), is a heavily-pigmented organelle located near the cell membrane that seems to function in light reception in â¦ certain single-celled organisms.
1 âPlusâ lenses are used to correct long sight and âminusâ lenses are used to correct short sight.  The âcylâ box for âcylinderâ represents the amount of astigmatism that is present. Astigmatism is caused when the eye is not completely spherical, like a football, but is shaped more like a rugby ball.