Quick Answer. Hurricane season in Jamaica starts on June 1 and ends on Nov. 30. Satellite weather forecasts work to allow tourists and island dwellers adequate time to take precautions when hurricanes approach during those months. Continue Reading.
blind spot. The beginning of the optic nerve in the retina is called the optic nerve head or optic disc. Since there are no photoreceptors (cones and rods) in the optic nerve head, this area of the retina cannot respond to light stimulation.As a result, it is known as the blind spot, and everybody has one in each eye.isual pathway. As the optic nerve leaves the back of the eye, it travels to the optic chiasm, located just below and in front of the pituitary gland (which is why a tumor on the pituitary gland, pressing on the optic chiasm, can cause vision problems).
The optic nerve exits through the back of the eye. The nerve is made up of fibers which originate in nerve cells located in the retina, the light-sensitive film coating the inside of the eye.In the normal state, the optic nerve head looks much like a doughnut, with the outer ring consisting of the nerve tissue.or these reasons, examination of the optic nerve and its ability to transmit the visual message is an essential portion of the examination for glaucoma. In most patients, the optic nerve can be readily examined.