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: numerator and denominator mean in the visual acuity chart
A: Visual Acuity Test It is a series of diagnostic techniques used in the examination of eyes, the…
Q: ?Enumerate the objective lenses.3 *
A: A lens is a transmissive optical device that focuses or disperses a light beam by means of…
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: 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: 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: Discuss the optics of imaging the source onto the retina.
A: The retina is a thin layer of tissue that surrounds the back of the eye on the interior. It is…
Q: Define about isoelectric focusing ?
A: The numerical value of the potential of hydrogen (pH) where the molecule is electrically neutral is…
Q: List the structures light travels through to reach thephotoreceptors of a human eye
A: Light moves towards the lens from the front of the eye (cornea). The cornea and the lens allow the…
Q: To ensure easier focusing, what should be done first before the HPO is swung into position?
A: High power objective lens is used to examine fine details of the given specimen. The total…
Q: What features do the ophthalmoscope include?
A: The eye is an important organ in a human’s life. It is the responsible organ for the vision and the…
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: What is the significance of using oil with the immersion lens and why can't oil be used with any…
A: An instrument that is used to see extremely small objects that cannot be seen by naked eyes is…
Q: Which objective lens has the least working distance?
A: In microscopy, the working distance can be defined as the distance between the front lens of the…
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 basic differences between fresh and fixed preparationsfor microscopy and how they are…
A: In microscopy, the preparation of a specimen involves the mounting of a sample on a suitable glass…
Q: Why is each eye tested separately during an eye exam?
A: Eye is the chief organ of the visual system. They are involved in detecting the light rays and…
Q: What is the relationship between the diopter number that show up on opthalmoscope when one is…
A: Scientific notations are used in writing medical reports including an eye check-up report that an…
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: 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: What is the primary difference between the method of focusing used by the eye and by a camera?…
A: Eye is a magnificent natural living organ that records the image whereas camera is also an…
Q: The least distance of distinct vision for an eye lens is caused by the action of the:(a) 25 m(b) 2.5…
A: Least distance of distinct vision is defined as the minimum distance of a object from eye to form…
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: 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: Explain the Workings of an oil immersion lens.
A: Oil immersion lens: A type of objective lens that can focus when there is a drop of liquid (such as…
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: Enumerate the steps involved in process of sense of sight.
A: Vision relies chiefly upon one tangible organ—the eye. Eye developments differ in complexity relying…
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: 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: What are the applications of ?contact lenses
A: There are several reasons behind problems that arise in the vision of people. These problems can be…
Q: Match the following terms to their correct description: pupil, iris,lens, retina, and cornea.…
A: On the ventral portion of brainbox and above both sides of nose their are two cavities or orbits…
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: Does the image contrast increase or decrease when closing the diaphragm during microscopy.
A: There are many objects that cannot be seen with naked eye. To view those objects different…
Q: Does image brightness increase or decrease when closing the diaphragm during microscopy.
A: Microscope is an optical instrument which has major application in visualizing very small to…
Q: Why is it not irecommended to start with high dry or oil immersion lenses
A: Microscopes are used for viewing those specimens which are very minute and cannot be seen through…
Q: Name the watery fluid filled in the aqueous chamber of the eyeball.
A: The eyes are organs of sight and perception. The wall of the eyeball can be divided into three…
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 must the angle of astigmatism be determined before the corrective power of the lenses ? the…
A:
Q: Name the structure that hold lens in its position.
A: Humans have a pair of eyes located in sockets of the skull known as orbits. The human eyeball is…
Q: Name the fluid present in the anterior part of the eye in front of the eye lens.
A: The eye consist of three main layers and these are flat and forms the eyeball. The outer layer is…
Q: Match each of the options above to the items below. Lens Choroid Vitreous humor Retina
A: Eye It is a small spherical sense organ of the body which help in the seeing things.
Q: Differentiate between near vision and distinct vision on the basis of shape of the eye lens.
A: Eye is the chief organ of the visual system. In most mammals they are paired structures and are oval…
Give the resolution of eyepiece, scanning objective, LPO, HPO and OIO
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- which objective lens is in place if the object you are viewing is magnified 1000x? (assume ocular lens magnification = 10x)Magnification: LPO Magnification: HPO a. Describe the relationship between the image between the eyepiece and on the stage.DIRECTION: 1) ILLUSTRATE THE SPECTROPHOTOMETRIC WORKFLOW PROCESS STARTING FROM THE LIGHT SOURCE UP TO THE READ-OUT DEVICE. MAKE SURE TO LABE COMPLETELY.
- Which of the following affect the resolution of a specific objective lens? CHECK ALL CORRECT CHOICES. Magnification Numerical Aperture (NA) Warelengthrofgnt combg tough t Field of ViewDiscuss the optics of imaging the source onto the retina.Distance between the eye and eye chart must be 6 meter during examination of visual acuity. Why?
- Compute for the total magnification of the following: Ocular Objectives Total Magnification 5x Scanner 5x Low Power 10x Scanner 10x High Power 10x Oil Immersion 15х Scanner 15x Low Power 15x Oil ImmersionIndicate how the resolving power is determined and how resolution aff ects image visibility.Does image brightness increase or decrease when closing the diaphragm during microscopy.