Not all light is absorbed by visual pigments in the retina. Some of it penetrates through the visual pigments. When this bouncing occurs with the light that comes into the eyes, the animals effectively intensifies the quantity of light accessible for the eyes to see with. Therefore, increasing the capability to see in the darkness. With human beings, the eyes mirror light, however, does act like a reflector. Human eyes appear red in some flash photographs as a result of the camera flash bouncing off the red blood vessels and red tissue in the retina. This happens when using a photographic flash up close a camera lens, in relatively low light (Richard, 14).
The red-eye effect appears in the animal and human eyes that do not have tapetum lucidum. The red-eye effect is as a result of the color of the fundus, a pigment predominantly positioned in the retinal pigment epithelium. The fundus color is a result of melanin pigment. When the light coming from a flash happens too quickly for the pupil to close, plenty of the very bright light from the flash penetrates the eye through the pupil. Due to this, the fundus at the retina is reflected off and out through the pupil. The camera registers the reflected light and emits it as a red-eye effect (Richard, 14).
Chromatic Aberration is a typical optical problem that happens when a lens is incapable of conveying all wavelengths of color to the same focal plane. Chromatic aberration can also occur when the wavelengths of colors are concentrated on different locations in the focal plane. Chromatic aberration is initiated by lens scattering with different colors of light drifting at varying speeds while passing through a lens. This causes the image to appear blurred or perceptible colored edges seem around objects, especially in high-contrast conditions (Nave, 2015).
An ideal lens would concentrate all wavelengths into a particular focal point, where the