The pupil of a person's eye changes from a diameter of 3.5 mm to 1.5 mm as the illumination is increased. By what factor does the minimum angle of resolution change?

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

A: The eye is a complex organ that provides vision with the help of accessory organs (lacrimal…

Q: In a converging lens, if an incident ray is parallel to the principle axis, the reflected ray…

A: Converging lens are thick from the middle, making the parallel rays convert to a point called focal…

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: Using a line diagram, show how parallel rays of light are brought to a focus on the retina. Explain…

A: Sense organs are specialized organs that allow the human body to perceive sight, smell, sound,…

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: To what extent do external factors influence brightness consistency?

A: The selection, organization, and understanding of insights can contrast among various individuals.…

Q: Give technical term for eye lens loosing flexibility resulting in kind of long sightedness in…

A: Long-sightedness is a condition in which a person is not able to see nearby objects. The distant…

Q: What is the diffraction-limited optical resolution of the human eye?

A: Diffraction affects the resolution as diffraction barrier blurs the light points which are near into…

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: OIL EMERSION IS REQUIRED FOR which lens

A: Oil immersion is a technique which is used to increase the resolving power of a microscope. A light…

Q: Contraction of a muscle usually puts more tension on a structure, but contraction of the ciliary…

A: Ciliary muscle present in the eye is a smooth muscle and mesodermal in origin and is responsible for…

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: 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: 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: By what the transparent lens in the human eye is held in its place?

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

Q: Name the photosensitive pigment present in the rod cells of the retina.

A: Human eye consists of rod and cone cells which are associated with the coloured and dim light…

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: 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: The size of the pupil is controlled by the O lens

A: The eye is the sensory organ that allows us to see. The eyes achieve vision with the help of visual…

Q: Discuss image formation by describing refraction, accommodation, and constriction of the pupil.

A: The human eye has three distinct regions. The outer region consists of the sclera that is the tough,…

Q: While a student is examining the anterior half of the eye in cadaver lab, the cadaver lens falls…

A: The lens is made up transparent  proteins called crystallins . The average concentration of lens…

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: An ophthalmic solution contains 2% dorzolamide in 10-ml containers and the prescribed dose is one…

A: As a nurse its her responsibility to remember the formula while calculating the drug to avoid…

Q: choose one of the vision problems that can be corrected by LASIK.

A: LASIK is a surgical process in which the surgeon modifies the tissue shape present in front of the…

Q: Which lens requires the use of cedarwood oil? Why is it important to use oil when focusing under…

A: Microscopes are important instrument which allow the enlargement of image produced by object when…

Q: Amplitude summation occurs in phase-contrast optics when both direct and diffracted rays area. in…

A: The microorganism is the organism that is too small to be seen with the naked eye. It is viewed by…

Q: What is the implication of a mark on the back of the eye when it appears black in a red free filter…

A: The red-free filters have a peak transmission of 540nm to 570nm in wavelength, allowing for…

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: Write M or B after each of the following to indicate if it is a monocular or binocular depth cue.…

A: Hi, Thanks For Your Question.  Answer : Monocular Depth Cues : Monocular Depth Cues Use Only One Eye…

Q: What happen to the image distance in the eye when we increase the distance of an object from the…

A: The eye is important to form images and intensity of detecting color and detail of the object. The…

Q: i) Explain why the crystalline lens of the eye gets a virtual object from the cornea.

A: The name “crystalline lens” is given to the natural lens of the human eyes. It is a transparent,…

Q: Where in the eye does the main refraction take place? a) in the ventricular fluid b) in the…

A: Introduction:-  Like a camera, the human eye focuses light to produce sharp images. Refraction is…

Q: Which power (low or high) will allow you to see more of the object?

A: Hello, thank you for your question, hope this answer helps you.

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: As has been done since the beginning of time, removing the lens of the eye for the purpose of…

A: Cataract surgery is one of the most common procedures performed worldwide. It is also one of the…

Q: Name the photosensitive pigment present in the cone cells of the retina.

A: Cone cells are cone shaped photo-receptor cells present on retina of our eye. They are closely…

Q: Give the resolution of eyepiece, scanning objective, LPO, HPO and OIO

A: Resolution: The lowest distance at which two distinct points of a specimen can still be viewed as…

Q: Match each of the options above to the items below. Iris Pupil Sclera Retina

A: The human eye is a specialized sense organ that reacts to light and is able to visualize images and…

Q: A typical incandescent lightbulb emits approximately 3 x 1018 visible-light photons per second. Your…

A: Incandescent lightbulb emits approximately 3 x 1018 visible-light photons per second. When eye is…

Q: Cataracts, the medical condition where the lens of the eye becomes cloudy, are a leading cause of…

A: Cataract: a. Cataract is the leading cause of blindness in both developed and developing countries.…

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 happens when you change the objective lense

A: The compound light microscope is routinely used in cell biology laboratories to observe the internal…

Q: If you have a transparent or thin specimen, do you need to open or close the iris diaphragm? As…

A: Shutting the iris diaphragm will decrease the measure of enlightenment of the specimen yet expands…

Q: How can you compare various parts of eye with a photographic camera?

A: The eye of a human and camera are similar in their mechanism. Both of these are involved in…

Q: List any five aspects of the Human Eye that allow it to record images in the real world.

A: The human eye is a sense organ which responds to visible light and enables us to utilise visual data…

Q: Which part of the human eye provides most of the refraction for the light raysentering the eye?

A: Sight is a very important sense, made possible by the eyes. The vertebrate eye is a very complex…