The following are true about the Troxler's phenomenon: a. it refers to disappearance of an image during steady fixation of another object b. it only occurs in the peripheral retina c. eye movement eliminates this phenomenon d. movement of the object eliminates this phenomenon

The following are true about the Troxler's phenomenon:
a. it refers to disappearance of an image during steady fixation of another object
b. it only occurs in the peripheral retina
c. eye movement eliminates this phenomenon
d. movement of the object eliminates this phenomenon
by

1 Answer

Answer :

movement of the object eliminates this phenomenon
by

Related questions

The following are true: a. Kirschman's law: the greatest contrast in colour is seen when the luminosity differnece is small b. Emmbert's law: the perceived size of an object varies in proportion to the distance of the surface on which it is projected c. Hering's law: the contraction of a muscle is accompanied by simultaneous and proportional relaxation of the antagonist d. Troxler's phenomenon: an image in the periphery of the retina tends to fade or disappear during steady fixation of another objec

Description : The following are true: a. Kirschman's law: the greatest contrast in colour is seen when the luminosity differnece is small b. Emmbert's law: the perceived size of an object varies in ... image in the periphery of the retina tends to fade or disappear during steady fixation of another objec

Last Answer : Troxler's phenomenon: an image in the periphery of the retina tends to fade or disappear during steady fixation of another objec

The image of an object formed on the retina of the eye is - (1) virtual and upright (2) virtual and inverted (3) real and inverted (4) Real and upright

Description : The image of an object formed on the retina of the eye is - (1) virtual and upright (2) virtual and inverted (3) real and inverted (4) Real and upright

Last Answer : (3) real and inverted Explanation: Although the image is inverted the mental interpretation of the effect on the retina is as though it is erect.

The following are true about spectral sensitivity of the retina: a. in scotopic conditions, the peak sensitivity of the eye is near 500 nm b. under photopic conditions the peak sensitivity is near 555 nm c. in the presence of a bright yellow steady background light the retina has a peak sensitivity near 440 nm to a 25-Hz stimulus d. all above

Description : The following are true about spectral sensitivity of the retina: a. in scotopic conditions, the peak sensitivity of the eye is near 500 nm b. under photopic conditions the peak sensitivity is near 555 nm c ... light the retina has a peak sensitivity near 440 nm to a 25-Hz stimulus d. all above

Last Answer : all above

Whenever a new product eliminates another product because of its improvements, such as CDs to Cassettes, this phenomenon is referred as A. Improvements B. Creative destruction C. Creative construction D. Improvement destruction

Description : Whenever a new product eliminates another product because of its improvements, such as CDs to Cassettes, this phenomenon is referred as A. Improvements B. Creative destruction C. Creative construction D. Improvement destruction

Last Answer : B. Creative destruction

A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to alter the apparent motion of any distant object c. Maximizing the time spent looking in each sector to allow the maximum chance of detecting movement d. Maintaining as far as possible a lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Description : A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to ... lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Last Answer : a. Minimizing the duration of eye rests and making as many eye movements as possible

A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to alter the apparent motion of any distant object c. Maximizing the time spent looking in each sector to allow the maximum chance of detecting movement d. Maintaining as far as possible a lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Description : A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to ... a lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Last Answer : a. Minimizing the duration of eye rests and making as many eye movements as possible

The following are true about ocular circulation: a. only 4% of the total blood supply to the eye goes to the retina b. the choroidal blood flow in normal people is ten times that of the grey mater of the brain c. autoregulation occurs in both retinal and choroidal circulation d. a PaCO2 rise of 1 mm Hg induces a 3% rise in retinal blood flow

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Last Answer : a PaCO2 rise of 1 mm Hg induces a 3% rise in retinal blood flow

The following are true: a. depth of perception only occurs in patients with normal visual acuities in both eye b. Hering's law states that increased innervation to an extraocular muscle is accompanied by a decrease in innervation to its antagonists. c. objects on the Panum's area fall on simultaneous areas of the retina d. objects outside of the Panum's area are perceived as doubl

Description : The following are true: a. depth of perception only occurs in patients with normal visual acuities in both eye b. Hering's law states that increased innervation to an extraocular muscle is ... simultaneous areas of the retina d. objects outside of the Panum's area are perceived as doubl

Last Answer : objects outside of the Panum's area are perceived as doubl

The following are true about dark adaptation: a. only regeneration of rhodopsin is responsibleb. adaptation usually takes about 20 minutes c. dilatation of pupil plays a part in dark adaptation d. it is better with the fovea than the peripheral retina

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Last Answer : dilatation of pupil plays a part in dark adaptation

How is image formed on the retina of a human eye?

Description : How is image formed on the retina of a human eye?

Last Answer : Real and inverted

What is the image of the object in the retina ?

Last Answer : Real and inverted images of objects are formed in the retina.

When viewing an object near to your eyes the following are required for proper image formation of the retina ? (A) Contraction of the ciliary muscles

Description : When viewing an object near to your eyes the following are required for proper image formation of the retina ? (A) Contraction of the ciliary muscles

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When we see an object, the image formed on the retina is – (1) Real and inverted (2) Real and erect (3) Virtual and erect (4) Virtual and inverted

Description : When we see an object, the image formed on the retina is – (1) Real and inverted (2) Real and erect (3) Virtual and erect (4) Virtual and inverted

Last Answer : (1) Real and inverted Explanation: The retina is the thin lightsensitive membrane lining the inner eyeballtowards the back of the eye. As our eye lens are convex in nature, they form mostly real ... message sent by the optic nerve are chemical impulses which turn them into erect images that we see.

When we see an object, the image formed on the retina is (1) Real and inverted (2) Real and erect (3) Virtual and erect (4) Virtual and inverted

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Last Answer :  Real and inverted 

While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is (A) Correctly focussed (B) Not correctly focussed (C) Said to have parallax (D) Free from parallax

Description : While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is (A) Correctly focussed (B) Not correctly focussed (C) Said to have parallax (D) Free from parallax

Last Answer : (C) Said to have parallax

Which of the following is not a characteristic feature during mitosis in somatic cells? (a) Chromosome movement (b) Synapsis (c) Spindle fibres (d) Disappearance of nucleolus

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Last Answer : (b) Synapsis

A steady state within the body is termed a) Homeostasis. When a change occurs that causes a body function to deviate from its stable range, processes are initiated to restore and maintain the steady state or homeostasis. b) Constancy. Constancy refers to the balanced internal state of the human body maintained by physiologic and biochemical processes. c) Adaptation. Adaptation refers to a constant, ongoing process that requires change in structure, function, or behavior so that the person is better suited to the environment. d) Stress. Stress refers to a state produced by a change in the environment that is perceived as challenging, threatening, or damaging to the person’s dynamic balance or equilibrium.

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Last Answer : a) Homeostasis. When a change occurs that causes a body function to deviate from its stable range, processes are initiated to restore and maintain the steady state or homeostasis.

The phenomenon of interchange of the left side and right side between the object and its image is called_________. a) reflection b)refraction c)dispersion d)lateral inversion

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Assertion :- Disappearance of nuclear membrane is generally essential for karyokinesis Reason :- Forward movement of chromosomes is dependent on spind

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The Pulfrich phenomenon: a. occurs in patients with bilateral macular degeneration b. occurs in optic neuritis c. refers to the perception of photopsia d. refers to the illusion of abnormal motion

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Last Answer : refers to the illusion of abnormal motion

Doll's head phenomenon: a. refers to movement of the eyes in a direction opposite to which the head is suddenly moved b. elicits both horizontal and vertical vestibuloocular reflexes c. is absent in patients with brain stem death d. all above

Description : Doll's head phenomenon: a. refers to movement of the eyes in a direction opposite to which the head is suddenly moved b. elicits both horizontal and vertical vestibuloocular reflexes c. is absent in patients with brain stem death d. all above

Last Answer : all above

In binocular vision: a. only points on the horopter fall on the corresponding retinal point b. points in front of the horopter will stimulate binasal retina c. points outside the horopter is perceived doubly d. the Panum's fusional area is wider in the centre than the periphery e. sensory fusion refers to the cortical integration of images perceived by the two eyes

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Last Answer : only points on the horopter fall on the corresponding retinal point

Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions characteristics. (a) C-Aqueous chamber-Reflects the light which does not pass through the lens. (b) D - Choroid - Its anterior part forms ciliary body. (c) A - Retina - Contains photoreceptors, i.e., rods and cones. (d) B - Blind spot-Has only a few rods and cones.

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Last Answer : (c) A - Retina - Contains photoreceptors, i.e., rods and cones.

In the leaves of `C_(4)` plants, malic acid formation during `CO_(2)` fixation occurs in the cells of

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In the mesophyll cells of CAM plants, `CO_(2)` fixation during the night day occurs through

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The CO2 fixation during C4 pathway occurs in the chloroplast of (a) guard cells (b) bundle sheath cells (c) mesophyll cells (d) spongy parenchyma.

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In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of (a) bundle sheath (b) phloem (c) epidermis (d) mesophyll.

Description : In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of (a) bundle sheath (b) phloem (c) epidermis (d) mesophyll.

Last Answer : (d) mesophyll.

In leaves of C4 plants, malic acid synthesis during CO2 fixation occurs in (a) bundle sheath (b) guard cells (c) epidermal cells (d) mesophyll cells

Description : In leaves of C4 plants, malic acid synthesis during CO2 fixation occurs in (a) bundle sheath (b) guard cells (c) epidermal cells (d) mesophyll cells

Last Answer : (d) mesophyll cells.

The phenomenon of slow growth of strain under a steady tensile stress, is called (A) Yielding (B) Creeping (C) Breaking (D) None of these

Description : The phenomenon of slow growth of strain under a steady tensile stress, is called (A) Yielding (B) Creeping (C) Breaking (D) None of these

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Where is the image of an object formed in the human eye? -General Knowledge

Description : Where is the image of an object formed in the human eye? -General Knowledge

Last Answer : answer:

The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescopes (A) Resolving power (B) Brightness (C) Field of view (D) Magnification

Description : The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescopes (A) Resolving power (B) Brightness (C) Field of view (D) Magnification

Last Answer : (D) Magnification

The real image of an object formed by the objective must lie (A) In the plane of cross hairs (B) At the centre of the telescope (C) At the optical centre of the eye-piece (D) Anywhere inside the telescope

Description : The real image of an object formed by the objective must lie (A) In the plane of cross hairs (B) At the centre of the telescope (C) At the optical centre of the eye-piece (D) Anywhere inside the telescope

Last Answer : (A) In the plane of cross hairs

Image of object is formed on which part of eye?

Description : Image of object is formed on which part of eye?

Last Answer : Retina

Purkinje's shift: a. refers to the transition of retinal sensitivity between photopic and scotopic vision b. refers to the shift in the spectral sensitivity of the human retina toward shorter wavelengths of light c. accounts for blue colour appearing brighter at dusk d. all above

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Last Answer : all above

Thrombolytic therapy has become a useful adjunct in the management of peripheral arterial occlusion. In this setting, direct intraarterial administration rather than intravenous has been advocated to decrease the risk of systemic bleeding. Which of the following true statement(s) concerning the use of thrombolytic agents for arterial occlusion is/are true? a. A standard technique involves infusing high-dose urokinase, 4000 units per minute for 1–2 hours, directly into the clot by a catheter embedded in the thrombus b. If progress is made, further fibrinolytic therapy is given at 1000 to 2000 units per minute until clot lysis has occurred c. The usual infusion time by the above-stated technique is usually in excess of 24 hours d. Successful clot lysis occurs more frequently in arterial graf

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Last Answer : Answer: a, b, e The most popular method for intraarterial thrombolytic therapy for arterial occlusion involves passing a guidewire through the thrombus with arteriographic guidance and ... acute arterial occlusion) or when distal vasculative is occluded and precludes appropriate inflow patency

Which of the following terms refers to the decrease in lens flexibility that occurs with age, resulting in the near point of focus getting farther away? a) Presbyopia Presbyopia usually begins in the fifth decade of life, when reading glasses are required to magnify objects. b) Presbycusis Presbycusis refers to age-related hearing loss. c) Cataract Cataract is the development of opacity of the lens of the eye. d) Glaucoma Glaucoma is a disease characterized by increased intraocular pressure.

Description : Which of the following terms refers to the decrease in lens flexibility that occurs with age, resulting in the near point of focus getting farther away? a) Presbyopia Presbyopia usually begins in ... lens of the eye. d) Glaucoma Glaucoma is a disease characterized by increased intraocular pressure.

Last Answer : a) Presbyopia Presbyopia usually begins in the fifth decade of life, when reading glasses are required to magnify objects.

Surgical fusion of a joint is termed a) arthrodesis. Arthrodesis of a joint is created surgically to treat chronic pain. b) open reduction with internal fixation (ORIF). ORIF refers to surgery to repair and stabilize a fracture. c) heterotrophic ossification. Heterotrophic ossification refers to formation of bone in the periprosthetic space. d) arthroplasty. Arthroplasty refers to surgical repair of a joint or joint replacement.

Description : Surgical fusion of a joint is termed a) arthrodesis. Arthrodesis of a joint is created surgically to treat chronic pain. b) open reduction with internal fixation (ORIF). ORIF refers to ... periprosthetic space. d) arthroplasty. Arthroplasty refers to surgical repair of a joint or joint replacement.

Last Answer : a) arthrodesis. Arthrodesis of a joint is created surgically to treat chronic pain.

Which of the following terms refers to fixation or immobility of a joint? a) Ankylosis Ankylosis may result from disease or scarring due to trauma.

Description : Which of the following terms refers to fixation or immobility of a joint? a) Ankylosis Ankylosis may result from disease or scarring due to trauma. b) Hemarthrosis Hemarthrosis refers to bleeding ... joint with two freely moveable parts. d) Arthroplasty Arthroplasty refers to replacement of a joint.

Last Answer : a) Ankylosis Ankylosis may result from disease or scarring due to trauma.

If someone dies with their eyes open does the lens still focus an image on the retina?

Description : If someone dies with their eyes open does the lens still focus an image on the retina?

Last Answer : I’m sure it does until the brain stops being able to process that image.. making it a moot point.

A person wears spectators with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes – (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Description : A person wears spectators with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes – (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Last Answer : (2) in front of the retina Explanation: A concave lens is used to correct short-sightedness (myopia). In myopia, images are formed in front of the retina, resulting in a blurred image. This ... relatively too long or the refractive powers of the cornea and lens of the eye are relatively too strong.

The junction of optic nerve and retina is insensitive to light and no image is formed here , it is known as ______. a)blind spot b)yellow spot c) fovea d)pupil

Description : The junction of optic nerve and retina is insensitive to light and no image is formed here , it is known as ______. a)blind spot b)yellow spot c) fovea d)pupil

Last Answer : a)blind spot

A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focussed in his eyes (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Description : A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focussed in his eyes (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Last Answer : in front of the retina

Lowering the flaps during a landing approach: a. Increases the angle of descent without increasing the airspeed b. Decreases the angle of descent without increasing power c. Eliminates floating d. Permits approaches at a higher indicated airspeed

Description : Lowering the flaps during a landing approach: a. Increases the angle of descent without increasing the airspeed b. Decreases the angle of descent without increasing power c. Eliminates floating d. Permits approaches at a higher indicated airspeed

Last Answer : a. Increases the angle of descent without increasing the airspeed

Those blood cells you can see when you look at the sky--are those in the lens of your eye, or the retina, or where?

Description : Those blood cells you can see when you look at the sky--are those in the lens of your eye, or the retina, or where?

Last Answer : Do you mean ‘floaters’? https://www.mayoclinic.org/diseases-conditions/eye-floaters/symptoms-causes/syc-20372346

What is the function of retina in human eye. -Science

Description : What is the function of retina in human eye. -Science

Last Answer : The retina acts as a screen on which the image is formed in the eye. The retina has a large number of light-sensitive cells. When the image falls on the retina then these light-sensitive cells get activated and generate electrical signals.

What is the function of the retina in the eye? -Biology

Description : What is the function of the retina in the eye? -Biology

Last Answer : answer:

How does the eye regulate the amount of light that falls on the retina? -Biology

Description : How does the eye regulate the amount of light that falls on the retina? -Biology

Last Answer : answer:

What is eye retina ?

Description : What is eye retina ?

Last Answer : The retina is a sensitive screen inside the eye where the image we see is captured.

Retina,eye lens brain and skin are formed from

Description : Retina,eye lens brain and skin are formed from

Last Answer : Retina,eye lens brain and skin are formed from A. Mesoderm-skeleton B. Ectoderm C. Endoderm D. Both ectoderm and endoderm.