The change in focal length of an eye lens is caused by the action of the:(a) Pupil(b) Retina(c) Cilliary muscles(d) Iris

Q: How does the eye regulate the amount of light that falls on the retina?

A: The donut-shaped structure present in front of the eye is called iris. Iris has a small hole in the…

Q: What is the visual outcome if the specific extrinsic eye muscle involved in convergence reflex did…

A: The extrinsic eye muscles control the movement of the eye. There are 6 types of extrinsic muscles…

Q: Explain in detail the movement of a Eyeball?

A: Eyeball is a spherical structure which contain sensory receptors for vision, found in all…

Q: What is the photoreceptor unit of a compound eye?

A: A compound eye, also known as the arthropod eye, is a vital visual organ in arthropods such as…

Q: Explain why a person with normal binocular vision isable to judge distance and depth of close…

A: Images from each eye merge together to form a single 3D image and this image is called binocular…

Q: What region of the retina contains a high density of photoreceptor cells and allows for extremely…

A: The fovea centralis of the retina contains high-density photoreceptor cells and allows for extremely…

Q: Which is the part of thehuman visual system wherethe receptors that sense light,i.e., the…

A: Eye is the chief organ of the visual system. In most mammals they are paired structures and are oval…

Q: describe the differences between normal, nearsighted, andfarsighted eyes and explain how defective…

A: Humans have five sense organs out of which eyes are one of the sense organ. It is a sense organ…

Q: List the optical components of the eye and state the role of each one in the formation of an image?

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

Q: Explain why the retina can detach from the eyeball with just a blow to the back of the head.

A: The retina is the outgrowth of the forebrain. It is a membrane that covers the inner surface of the…

Q: Name the structure that provides and maintains shape of eyeball.

A: Eye is the chief organ of the visual system. They are involved in detecting the light rays and…

Q: What is the function of optic nerve in human eye?

A: The eye is the organ of the vision. The structure of the eye consists of the iris, corona, retina,…

Q: How do the ciliary body and lens focus light from a near object on the retina?

A: The eyes are one of the sensory organs which allow us to see the environment surrounding us. The…

Q: What would vision be like after a drug has destroyed all the cones in the retina?

A: About 2 million Americans annually suffer from substance-abuse disorders. According to a report,…

Q: What happens to the pupil of the eye when the light is very bright?

A: The pigmented portion of the eye which is present in the eyeball's middle layer (vascular tunic) is…

Q: Name the accessory structures that protect the human eye?

A: Eye is the structure which helps to see the objects and the surrounding environment around us. when…

Q: Why is the eye "strained" more upon viewing nearby objects then far objects?

A: An eye is the vital organ needed for sight which reacts to light and allows vision. It has…

Q: hat power of accommodation of the eye, when object viewed from 20- 500cm from his eye.?

A: Eye power accommodation is changing the shape of lens and adjusting the focal length is states as…

Q: Describe the structures of the human eye that light passes before reaching the retina.…

A: The structure and functios of the eyes are complex, composed of many complementary elements that…

Q: Light rays from an object in the temporal half of the visual field strike which half of the retina?

A: The visual field may be defined as the total area of vision of our eyes. When our eyes are focused…

Q: Which structure of the eye is responsible for focusing visual stimuli?

A: Introduction :- The eye has a spherical ball form with a small protrusion in the front. There are…

Q: Diagram the structure of the human eye.

A: The human eye is a paired sense organ that reacts to light and allows vision. Rod and cone cells in…

Q: Because fibers of the optic nerve that originate in the nasal halves of each retina cross over at…

A: Into the nasal (medial) half and the temporal (lateral) half, the visual field of each eye is…

Q: Identify the structures of the human eye.

A: The eye is the central organ for vision. It is made up of 3 layers- choroid, sclera and retina. The…

Q: Describe how the ciliary muscle controls the shape of the lens.

A: The human eye contains a different structure that helps the eye to produce a clear vision of the…

Q: Which extrinsic eye muscles abduct the eye (move the eye laterally)?

A: Step 1 The extraocular muscles are located in the orbit but are extrinsic and separate from the…

Q: What are the mainstructures of the human eye?

A: Human eyes are the main organ of the sense of vision and have carry the photoreceptors for sight.…

Q: Name the structure that imparts color to the eye.

A: Eye is an organ responsible for sight/ vision. There are many structures which works together to…

Q: What is meant by Optic chiasm?

A: The optic nerve is the second cranial nerve that helps in the vision.  The optic nerve occurs in…

Q: what are the factors affecting visual perception of humans?

A: Visual perception is the ability to interpret the surrounding environment through photopic vision…

Q: Paralysis of a medial rectus muscle would affect (a) accommodation,(b) refraction, (c) depth…

A: There are six extrinsic eye muscles that help to keep the eyeball in shape. They also regulate the…

Q: Name the internal layer of the eye which prevents reflection of light.

A: An eyeball is a spherical structure that helps in vision which fits in an eye skeleton known as bony…

Q: fibers project from the optic chiasm to the midbrain?

A: The optic chiasm is an X-shaped structure formed by the crossing of the optic nerves in the brain.…

Q: Explain The cellular and molecular basis of vision?

A: Vision basically refers to the ability to see. This is possible with the help of one of the sensory…

Q: Define the Chemistry of Vision ?

A: Vision is one of the five senses in human beings. Photoreceptors are responsible for sensing light…

Q: Name the part of eye which refract eye rays to focus on retina.

A: Eye is an organ responsible for sight/ vision. There are many structures which works together to…

Q: Name the structure that carries visual stimuli from retina to the brain.

A: Eye is a sense organ of sight that helps in perceiving visual information from the environment and…

Q: The arrangement of tunics in the eye, from the innermost to outermost aspect of the eye, is a.…

A: The eye is the sensory organ for vision and lies in the cavity of the orbit. The retina is regarded…

Q: When you change your focus from near to a far object, describe the three main mechanisms occur in…

A: Introduction :- The human eye is a sense organ that responds to light to allow vision. Both the…