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 disc or optic nerve head is the location where ganglion cell axons exit the eye to form the optic nerve. There are no light sensitive rods or cones to respond to a light stimulus at this point. This causes a break in the visual field called the blind spot or the physiological blind spot. The optic nerve head in a normal human eye carries from 1 to 1.2 million neurons from the eye towards the brain.