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

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: 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: Explain how the images are formed, along with the role of light andthe different powers of lenses.

A: The light microscopes or optical microscopes use visible light and a collection of lenses to magnify…

Q: To what extent do external factors influence brightness consistency?

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

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: List all tissues or cell layers through which light passesfrom when it enters the eye until it is…

A: BASIC INFORMATION  HUMAN EYE It is a paired structure present in the orbits in the skull It is a…

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: 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: Explain the low-angle rotary shadowing.

A: Rotary Shadowing : It allows high contrast visualization of of both individual macromolecules and…

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: Under normal visual circumstances, explain why small objects are not lost from our vision.

A: The eye is a three-layered, fluid filled ball divided into two chambers. The human eye is designed…

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: Why is it difficult to see colors in dim light?

A: The back portion of the eye that responds to light is called the retina. This is carried out with…

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: Briefly explain how an image is made and magnified.

A: There are two lenses in a microscope. One lens is an objective lens and the other one is an…

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: 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: What does the objective lens magnify

A: There are two types of lenses- 1. Objective lens- The lens near the specimen is called the objective…

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: 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: Very short pulses of high-intensity laserbeams are used to repair detached portions of the retina of…

A: The retina is referred to as the thin layer of connective tissue that is present in the eye near the…

Q: When you increase the magnification what happens to the visual field?

A: Microscope are instruments that are used in the science laboratories to visualise very minute…

Q: Why must the subject stand 20 feet from the Snellen eye chart to test distance vision?

A: Snellen chart is an object used to measure the visual activity of a person. Snellen chart is first…

Q: Which is the correct order of the structure through which light passes after entering the eye? O…

A: Question- Which is the correct order of the structure through which light passes after entering the…

Q: ? which device is used for refraction A direct ophthalmoscope .B retinoscope .C slitlamp .D…

A: According to the question, we have to find out which of the following device is used for refraction.…

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: 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: 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: Which part of the human eye conveys the electrical signals generated by the light sensitive cells of…

A: The human eye is an organ that reacts to light and allows vision. It is a fused two-piece unit,…

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: While viewing an object under low power you see a small organism at the edge of the field of vision.…

A: Step 1 Microscopes are the instrument used for observing smaller objects as well as finer internal…

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: 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: Why are you unable to focus on images closer to your eye than the near point values you determined?

A: The organ that provides vision is the eye and the main function of the eye is to focus the 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: 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: 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: Briefly describe the use of refractive index in contrast.

A: Two types of pictures are created by the microscopes' lenses when a specimen is placed beneath the…