Name one defect of vision which cannot be corrected by any type of spectacle lenses?

Q: If someone is color-blind, which structure is malfunctioning? A.None B.Cones C.Cornea D.Rods…

A: Colour blindness is the inability to distinguish certain colours.

Q: Name the two structures in the eye responsible for bringing about the change in the shape of the…

A: The eye is one of the sensory organs present in the body of an organism. It is responsible for…

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: A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the corrective…

A: Myopia is a defect in vision in which objects are seen only when present very close to the eyes. it…

Q: How does the eye’s lens change shape to allow focusing of distant objects? What defects make…

A: The Eye is an organ of sight that perceives visuals from the environment and sends electro-chemical…

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: What happens at the optic chiasma? What is the consequence of this?

A: Optic chiasma are locations within the brain where optic nerve fibers from either eye cross over…

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: Which defect of vision can be rectified using a concave lens?

A: The eye is the organ of visual system that consists of rod and cone cells. These cells are present…

Q: Mention any five characteristics of the human eye that enable it to capture images in the real…

A: The cornea, iris, pupil, aqueous humour, lens, vitreous humour, retina, and optic nerve are the main…

Q: Discuss the duplicity theory of vision, summarizing theadvantage of having separate types of retinal…

A: The cells of the retina that are respond to light are referred to as photoreceptors. Two types of…

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: Since the visual images areprojected in an invertedmanner on the retina whydon't we see things…

A: Human eye consist of biconvex lens which help to form a real and inverted image of an object. Light…

Q: Anatomically, what causes a blind spot on the retina?

A: The ganglion cells of the retina have their axons continuing into the optic nerve, also known as the…

Q: What is the least distance of distinct vision of a normal human eye?

A: Least distance of distinct vision of human eye is the minimum distance of an object from an eye to…

Q: Why do we detect faint light more effectively in the periphery of the retina than in the fovea?

A: Faint light or dim light is detected by rods in retina

Q: Name the three layers of which the wall of eyeball is made of.

A: Eyeball is a bilateral,  spherical organ located in orbit (bony cavity) . It is made up of 3 layers…

Q: Give appropriate term for the region of distinct vision in the eye.

A: Eye is the specialized organ of the visual system. The eyes provide an ability to receive and…

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: A 10-year-old patient’s distance visual acuity was tested and determined to be 20/80. (a) Explain…

A: Visual acuity is measured to determine how clear a person could see. It is determined by using a…

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: Why is a normal eye not able to see clearly the objects placed closer than 25 cm?

A: The eye lens is composed of fibrous, jelly-like material. To see closure and distant object, Its…

Q: identify three difference between vision at the fovea centralis and peripheral vision

A: According to the question, we have to identify the differences between vision at the fovea centralis…

Q: Describe the path of light through the eye.

A: Path of light through eye.

Q: Describe the path light takes as it moves through the eye (from cornea to the rods and cones in the…

A: Eye helps us in sight.

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: which cannot be corrected by any type of spectacle lenses?

A: The eye is a complicated organ that works in conjunction with other organs to provide vision…

Q: The change in focal length of an eye lens is caused by the action of the:(a) Pupil(b) Retina(c)…

A: Contraction or relaxation of muscles in an eye is responsible for focusing the object, phenomenon…

Q: List the structures and fluids through which light passes as it travels from the cornea to the…

A: The eye is an organ, which detects light and sends signals along the optic nerve to the brain. It is…

Q: Name the condition in which light rays are formed behind the retina.

A: Eye is a specialized sensory unit that is responsible for clear vision that helps in the perception…

Q: Which convex lens is called as converging lens?

A: A convex lens is a lens with two spherical surfaces that bulge outward from the middle. Therefore,…

Q: Name the fluid that occupies the larger convity of eye ball behind the lens.

A: The eyeball is the spherical organ. It occurs in the bony orbit of the facial skeleton. It is mainly…

Q: identify three differences between vision at the fovea and peripheral vision.

A: Sense organs are the particular organs made out of sensory neurons, which assist us with seeing and…

Q: Why are pure tones used to determine hearing sensitivity ?

A: A pure tone is defined as the sound with a sinusoidal waveform; that is, a sine wave of any…

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: Hypermetropia can be corrected by the use of convex lens. Comment.

A: The ability to see is called vision. There are 3 common defects of vision, including myopia…

Q: Why do rods provide greater visual sensitivity while cones provide better acuity?

A: Rods are cylindrical in shape and thin. Rods are more in number (120 million ). Cones are conical in…

Q: Presbyopia is a condition in which a person loses part or all of their capacity to adapt to changes…

A: Introduction :- Presbyopia, also known as "ageing eye," is a condition in which the eye loses its…

Q: During a routine eye exam, Lilibeth, a 45-year-old woman mentions to her optometrist that her…

A: The human eye is the organ that is responsible for vision. The eye consists of two major…

Q: What is the photoreceptor unit of a compound eye? How does this unit adjust to varying amounts of…

A: Compound eyes are found in annelids, molluscs and arthropods. Compound eyes are involved in the…

Q: What is the general direction of the cone of light in the ear?

A: In mammals, the organ that is used for hearing is the ear. The ear consists of three parts—the outer…