Retina

have specifically chosen blindness, since I know that it is not easy to treat and cure blindness . Your eyes and, brain have a very important function for seeing. The eye is made up of many different parts, which include the cornea, iris, lens, and retina. All these parts work together to focus on light and images. Your eyes use special nerves to send what you see to your brain, so that it can process and recognize what is happening. If this process doesn’t…

The retina is a layer of tissue in the back of the eyeball that contains photoreceptors. These photoreceptors are called rods and cones. They are both sensitive to light and convert the light into signals that the brain can read. Rods interpret low intensity light, while high intensity light is interpreted by cones. Rods cannot convey color, but cones can. Rods are located around the outside of the retina. Rods come into affect with periphery vision. Therefore, when light is dim, rods are the…

have improved the pharmacokinetic and pharmacodynamic properties of various types of drug molecules for the eye[11]. Advancements in material designs and formulations for new nanoparticles have offered exciting possibilities to deliver drugs to the retina[12]. Nanocarrier-based drug delivery system can be used for treatment diseases in the posterior segment of the eye, which can overcome the issue of frequent intravitreal…

One of the anatomical defects which affect the perception of colour is colour blindness. Heredity condition is caused by absence of one or more cones from retina. They are located within the fovea in central part of the retina where the light is converted into retina and the sharpest and clearest vision is achieved. The cones contain photopigment, L-cones for red colour and M-cones for a green colour. The wavelength of the reflected light determines what colour…

sensory organs that is responsible for vision. Through observation, we handled a cow’s eye and discerned our findings to our knowledge of a human’s eye. A cow’s eye has similarities, such as the overall layers of the eye like the sclera, choroid, and retina layer, to that of a human’s eye. Also the structures and organs contained within these layers. Also, we discovered many other anatomical structures that are much the same to a human's eye during the dissection. We were able to perceive the…

However, I am going to do a Trumpian exercise. A little lie. Colorblindness very simply is my ability to see color differently than all of you. In other words, I have no disease; I just have a different perception. The retina is composed of rods and cones. One of the photopigments in my cones is abnormal and thus I have red-green colorblindness. If you want to go even further into it, my type is called Protanopia, which is that I have no working red pigment cones. When…

Are dogs colorblind? the answer yes/ no, they see in color, just not the way humans do due to the lack of certain cones in their eyes. Moreover, how does color blindness work in humans? To see how color works we first have to analyze how we perceive color. The way we see “Color” is determined by the wavelength of a stream of light. This means that each color of light has its own wavelength. The combination of all lightwaves (primary colors) produces white. The absence of lightwaves makes an…

organs are responsible for this? How do they work? Our eyes are made up of eleven essential parts which work to together and allow us to see the world. Behind the iris and pupil of the eye, is a transparent lens which works to focus light into the retina and stimulate the two different light sensitive cells that cover it. The first cell, called the cone cells, help us see color and reside in the part…

Teaching point: For patients with chronic ocular conditions, patient re-education is key. ____’s condition is consistent with wet macular degeneration. Age Related Macular Degeneration (AMD) is the primary cause of legal blindness in North Americans 65 years of age or older. AMD is divided into two types: dry (also known as “nonexudative” or “non-neovascular”) and wet (also called “exudative” or “neovascular”). Approximately 10-15 percent of AMD cases involve dry AMD progressing to the more…

For about one-thirtieth of a second, the retina and brain retain that image, even when one stops looking at it. While a single image is being processed, another slightly different image appears. The brain combines images in motion, appearing as if moving as one item. Museum of Vision says, “Movies…