mcqs on human eye

Important MCQs on Human Eye in Physics with Answers

MCQs on Human Eye serve as invaluable resources for individuals preparing for initial academic tests in prestigious military branches such as the Army, Navy, and Pakistan Air Force (PAF). These multiple-choice questions delve into the intricate mechanisms and functions of the human eye, covering essential topics in physics.

In particular, they are crucial for aspirants aiming for positions in the Pakistan Navy Cadets, where a comprehensive understanding of optics is paramount.

Whether one seeks to join the Navy’s Operations Branch, Supply Branch, Ordnance Branch, Weapon Engineering Branch, or Education Branch, mastering these MCQs is imperative. These questions not only aid in academic assessments but also lay the foundation for practical applications in naval operations.

MCQs on Human Eye – Part-1

  • The bending of light as it passes from one medium to another is known as _______. (refraction)
  • The ratio of the speed of light in a vacuum to its speed in a medium is called the _______ of the medium. (refractive index)
  • When light passes through a converging lens, it can form an image called a _______. (real image)
  • The distance between the center of a lens or mirror and its focal point is called the _______. (focal length)
  • The phenomenon where light waves combine and reinforce each other is known as _______. (constructive interference)
  • The spreading out of light waves as they pass through a narrow slit is called _______. (diffraction)
  • The ability of a lens or optical system to form clear and distinct images is known as _______. (resolution)
  • The color of light with the shortest wavelength in the visible spectrum is _______. (violet)
  • When a light ray passes from a denser medium to a rarer medium, it _______ away from the normal. (bends)
  • The angle of incidence is equal to the angle of _______ for light passing through a boundary between two media. (reflection)

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MCQs on Human Eye: Mastering Light Refraction for Defence Exams

The comprehensive coverage provided by MCQs on Human Eye extends beyond military examinations, finding utility in civilian tests conducted across defense forces. Whether individuals are pursuing careers within the Army, Navy, or Air Force or seeking civilian positions within these organizations, a solid understanding of ocular physiology and optics is indispensable.

These questions serve as a universal benchmark for evaluating candidates’ aptitude in physics, ensuring that those selected possess the requisite knowledge to excel in their respective roles within the defense sector.

MCQs on Human Eye – Part-2

  • The distance between corresponding points on adjacent waves is called the _______ of the wave. (wavelength)
  • The point at which parallel light rays converge or from which they appear to diverge is called the _______. (focal point)
  • The bending of light around an obstacle or through an opening is a characteristic of _______. (diffraction)
  • The range of wavelengths of electromagnetic radiation that is visible to the human eye is called the visible _______. (spectrum)
  • The change in direction of light waves as they pass from one medium to another with different refractive indices is called _______. (refraction)
  • The ability of the eye to adjust its focus to see objects at different distances is called _______. (accommodation)
  • The transparent, biconvex structure in the eye that helps in focusing light onto the retina is called the _______. (lens)
  • The process by which the shape of the lens changes to focus on objects at different distances is known as _______. (accommodation)
  • The condition in which the lens of the eye cannot properly focus on distant objects is called _______. (myopia (nearsightedness))

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MCQs on Human Eye and the Electromagnetic Spectrum: Acing Defence Entry Tests

MCQs on Human Eye – Part-3

  • The condition in which the lens of the eye cannot properly focus on nearby objects is called _______. (hyperopia (farsightedness))
  • The change in the curvature of the lens of the eye during accommodation is controlled by the _______ muscle. (ciliary)
  • When the ciliary muscle relaxes, the lens becomes _______ and is able to focus on distant objects. (flatter/thinner)
  • The point in space where light rays from a distant object converge after passing through a lens is called the _______. (focal point)
  • The distance between the lens and the focal point is called the _______. (focal length)
  • The phenomenon where the lens fails to accommodate properly, causing nearby objects to appear blurred, is known as _______. (presbyopia)
  • A lens that is thicker at the center than at the edges is called a _______ lens. (converging/convex)
  • A lens that is thinner at the center than at the edges is called a _______ lens. (diverging/concave)
  • The condition in which the lens of the eye has an irregular shape, causing distorted vision, is called _______. (astigmatism)
  • The condition where both myopia and hyperopia are present in different meridians of the eye is known as _______. (mixed astigmatism)
  • The power of a lens is measured in units called _______.  (diopters)
  • The specialized cells in the retina that detect light and color are called _______. (photoreceptor cells)
  • The region of the retina that contains the highest concentration of cones and provides the sharpest vision is called the _______. (fovea)

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Past MCQs on Human Eye in Physics with Answers Free

For prospective candidates vying for roles in the Pakistan Air Force, MCQs on Human Eye hold significant importance, especially in assessments for branches like Aeronautical Engineering, Admin & Special Duty, Logistics, and Air Defence.

Understanding the principles governing vision and optics is vital for individuals pursuing careers as General Duty (GD) Pilots or enrolling in technical courses like the Technical Cadet Course. These MCQs serve as a bridge between theoretical knowledge and real-world application, equipping candidates with the skills necessary for success in PAF’s rigorous selection process.

MCQs on Human Eye – Part-4

  • The cells in the retina that are responsible for detecting dim light and peripheral vision are called _______. (rods)
  • The optic nerve carries visual information from the retina to the _______.(brain)
  • The process by which the brain interprets and makes sense of visual information is called visual _______. (perception)
  • The three primary colors of light that can be combined to produce any other color are _______. (red, green, and blue)
  • The theory of color vision that states that there are three types of color receptors in the retina is called the _______ theory. (trichromatic)
  • The phenomenon where the perception of a color persists even after the stimulus is removed is known as _______. (color afterimage)
  • The ability of the eye to distinguish between objects that are very close together is called _______. (visual acuity)
  • The phenomenon where the perception of a continuous motion is created by a rapid sequence of slightly different images is called _______. (persistence of vision)
  • The process by which the two eyes work together to provide depth perception is called _______. (binocular vision)

MCQs on Human Eye: Unveiling Color Perception through Physics

MCQs on Human Eye – Part-5

  • The part of the brain that plays a crucial role in processing visual information is called the _______. (visual cortex)
  • The perception of depth and three-dimensional space based on the way objects appear to change as we move is called _______. (depth perception)
  • The phenomenon where the brain perceives familiar patterns or objects even when they are incomplete or partially hidden is called _______. (perceptual completion)
  • The illusion where a stationary object appears to move when surrounded by a moving background is known as _______. (motion aftereffect)
  • The transparent, curved front surface of the eye that helps to focus light is called the _______. (cornea)
  • The transparent gel-like substance that fills the space between the lens and the retina is called the _______ humor. (vitreous)
  • The structure in the eye that controls the amount of light entering the eye by adjusting the size of the pupil is the _______. (iris.)
  • The colored part of the eye that controls the size of the pupil is called the _______. (iris)
  • The process by which the lens of the eye changes shape to focus on objects at different distances is called _______. (accommodation)
  • The point at which light rays converge after passing through the lens is called the _______. (focal point)
  • The distance between the cornea and the retina is approximately _______. (24 mm)
  • The part of the eye that contains the photoreceptor cells responsible for detecting light and color is the _______. (retina)

MCQs on Human Eye and the Power of Lenses: Conquering Defence Exams

MCQs on Human Eye serve as essential tools for individuals preparing for academic tests in esteemed military branches such as the Army, Navy, and Pakistan Air Force. Their relevance spans across various branches within these forces, including the Pakistan Navy Cadets, PAF Aeronautical Engineering, and Army EME Officers.

Moreover, these questions not only assess theoretical knowledge but also lay the groundwork for practical applications in military operations and logistical functions. Aspiring candidates must prioritize mastering these MCQs to enhance their chances of success in the competitive landscape of defense examinations.

MCQs on Human Eye – Part-6

  • The central region of the retina that is responsible for detailed central vision is called the _______. (macula)
  • The point on the retina where the optic nerve exits the eye is called the _______. (optic disc)
  • The condition in which the cornea is not perfectly spherical, causing blurred vision is called _______. (astigmatism)
  • The ability of the eye to detect and distinguish between different colors is called _______ vision. (color)
  • The range of wavelengths of electromagnetic radiation that the human eye can perceive is called the _______ spectrum. (visible)
  • The process by which the eye adjusts its sensitivity to different light levels is called _______. (adaptation)
  • The condition in which the lens of the eye becomes cloudy, leading to blurred vision, is known as _______. (cataract)
  • The eye defect where distant objects appear blurred is called _______. (myopia (nearsightedness))
  • Myopia can be corrected using _______ lenses. (concave/diverging)
  • The eye defect where nearby objects appear blurred is called _______. (hyperopia (farsightedness))
  • Hyperopia can be corrected using _______ lenses. (convex / converging)
mcqs on human eye with answers online

Important Human and their Defects MCQs in Physics

In the realm of Army examinations, MCQs on Human Eye play a pivotal role in evaluating the knowledge of aspiring Education Officers and Electronics and Mechanical Engineering (EME) Officers. These questions not only assess candidates’ grasp of fundamental optical concepts but also gauge their problem-solving abilities in physics.

Aspiring officers must demonstrate proficiency in areas such as refraction, accommodation, and visual perception, as these concepts are integral to various military operations and logistical functions.

MCQs on Human Eye – Part-7

  • The eye defect characterized by a distorted or irregularly shaped cornea is known as _______. (astigmatism)
  • Astigmatism can be corrected using _______ lenses. (cylindrical/toric)
  • The eye defect that typically occurs with age and causes difficulty in focusing on nearby objects is called _______. (presbyopia)
  • Presbyopia can be corrected using _______ lenses. (convex/converging/reading)
  • The process of combining different lenses to correct multiple eye defects is known as _______. (lens combination)
  • The measurement of the eye’s focusing ability, expressed in diopters, is called _______. (refractive error)
  • The transparent, artificial lens that is surgically implanted to replace the natural lens in the eye is called an _______ lens. (intraocular)
  • The technique used to reshape the cornea using a laser to correct refractive errors is known as _______. (LASIK (laser-assisted in situ keratomileusis))
  • The unit used to measure the power of a lens or the strength of an eyeglass prescription is called a _______. (diopter)

MCQs on Human Eye: Depth Perception and Binocular Vision – Physics for Defence Exams

MCQs on Human Eye – Part-8

  • A lens with a power of -4.00 diopters would be used to correct _______. (myopia/ nearsightedness)
  • A lens with a power of +2.50 diopters would be used to correct _______. (hyperopia / farsightedness)
  • Visual acuity is a measure of the _______ of an individual’s vision. (sharpness/clarity)
  • The unit used to measure visual acuity is _______. (Snellen)
  • The Snellen chart is used to measure _______. (visual acuity)
  • Visual acuity is typically expressed as a _______. (fraction/ratio)
  • In a visual acuity measurement of 20/40, the numerator represents _______. (the distance at which the test is performed)
  • In a visual acuity measurement of 20/40, the denominator represents _______. (the distance at which a person with normal vision can see the same line)
  • The ability to distinguish between two closely spaced objects is known as _______. (resolution)
  • The smallest distance between two points that can be resolved by the eye is called the _______. (minimum resolvable distance)
  • The minimum resolvable distance depends on the _______ of the eye. (angular resolution)
  • The angular resolution of the eye is determined by the _______ of the eye’s optics. (quality/focus)

MCQs on Human Eye – Part-9

  • The angular resolution of the eye can be improved by using _______ lenses. (corrective)
  • The angular resolution of the eye is highest at the _______. (fovea/center of the retina)
  • The ability to resolve fine details is enhanced by increasing the _______ of the object being observed. (contrast)
  • The Snellen chart consists of _______. (letters or symbols of different sizes)
  • Visual acuity is affected by factors such as _______ and _______. (age, refractive errors)
  • X-ray imaging is based on the differential _______ of X-rays by different tissues. (absorption)
  • In X-ray imaging, denser tissues such as bones appear _______ on the image. (white/brighter)
  • The technique that uses sound waves to create images of internal body structures is called _______. (ultrasound imaging/sonography)
  • In ultrasound imaging, echoes are produced when sound waves encounter tissue boundaries with different _______. (densities)
  • Magnetic resonance imaging (MRI) uses _______ fields and radio waves to generate detailed images of the body. (magnetic)
  • In MRI, images are produced based on the _______ properties of different tissues. (magnetic)
  • The technique that uses radioactive tracers to create images of the body’s internal structure and function is called _______. (nuclear imaging)
  • Positron emission tomography (PET) is a type of nuclear imaging that detects _______ emitted by radioactive tracers. (gamma rays)

MCQs on Human Eye – Part-10

  • Computed tomography (CT) combines X-ray imaging with _______ processing to create cross-sectional images of the body. (computer)
  • In CT imaging, a narrow X-ray beam rotates around the body, capturing multiple _______ of X-ray data. (projections)
  • Optical coherence tomography (OCT) is a non-invasive imaging technique that uses _______ to create high-resolution images of biological tissues. (light)
  • In OCT, the interference of light waves is used to measure the _______ of tissue structures. (reflectivity)
  • Fluoroscopy is a real-time imaging technique that uses _______ to visualize the movement of internal structures. (continuous X-rays)
  • In endoscopy, a flexible tube with a light and camera is inserted into the body to visualize _______ structures. (internal)
  • Magnetic resonance angiography (MRA) is a specialized form of MRI that focuses on imaging _______. (blood vessels.)

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  • Most Important MCQs of Physics with Answers (Download)
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