Question

1. List at least two ways the retina has adapted to minimize the potential problem caused by the photoreceptors being the last layer of the retina that light reaches.
2. Describe the events that take place during accommodation for near vision.
3. Detail the separate mechanisms activated in photoreceptor cells in the presence and in the absence of light.

Answer 1

The retina is the inner part and sensitive layer of the eye tissue of many vertebrates and Mollusca. They create the image in the electrical neural impulse of the brain to create visual perception. They perform the function of analogous to form an image in the camera. The retina is also composed of different layers of neuron which is connected by synapse. Primary metabolites in cells in the retina are the commonly different type to perform light and black and white vision.
The different ways which have adapted to decrease the potential problem which is caused by photoreceptors involve the layer of light reaches is the hemisphere of the eye. Vision is also an ability to detect the difference in the light wavelength which is also known as color vision. The sensitive retina is formed in the inner layer of the eye. Vision is one of the common that is caused by exposure to sunlight and artificial light sources. The different event that takes place during the accommodation of near vision involves the changes in the contraction of ciliary muscles. They alter the focal distance of the eye which causes the near and father object which is focused on the eye retina. This is also known as accommodation. The separate mechanism which is activated in the photoreceptor cells in the presence and the absence of light involves the cones which need bright light to produce the signal. This is the feature in the presence of a large amount which is a tightly packed photoreceptor. The cells in the retina respond to the light in most of the invertebrates. They involve the photon of the light by utilizing the change in their configuration.