In the back of each of Teresita's eyes, the axons of her ganglion cells all leave in one large bundle called the . As a result, this causes her to experience a .

The correct answers are: Optic Nerve, Blind Spot.

Explanation:

The Eyes are responsible for sensing Light.The light from an object is focused on the Retina of the eye by the help of a crystalline convex lens present in the front of the eye.The Retina forms a screen on which the image of the object is formed.The light is sensed by a specialized group of sensory epithelial cells which are located on the surface of the Retina of the eye and are called the Photo-receptor cells.There are two types of Photo-receptor cells present in the eye:The Rods cells which are responsible for detecting the intensity of light.The Cone cells which are responsible for detecting the color (wavelength) of the light.These photo-receptors are connected to neuronal cells which are  called the bipolar cells located beneath them.The bipolar cells are again connected to the ganglion cells, which are also neuronal cells.The ganglion cells have elongated axons which form a bundle called the Optic Nerve.The Optic Nerve is responsible for transmitting the sensory impulses from the eyes to the brain.The location in the eye ball where the Optic Nerve exits the eye and moves to the brain lacks any photo-receptors and is incapable of sensing light. This is called the Blind Spot.If the image of any object is formed on the blind spot of the retina in any person (Teresita), the person will be unable to see that object and will be blind for that object.

The correct answer is: making up measurement to record