Krimsky Test in Hindi | Krimsky Test | Prism Bar Reflex Test | PBRT | Modified Hirschberg test

Prism reflex test (Krimsky's corneal reflex test)
Prism reflex test first described by Krimsky has become universally accepted as a practical method of estimating the size of the angle of squint in patients with a blind or deeply amblyopic eye with or without eccentric fixation.
To perform the test, patient is asked to fixate on a point light and prisms of increasing strength (with apex towards the direction of manifest squint) are placed in front of the normal fixating eye till the corneal reflex is centred in the squinting eye (Fig. 6.7). The power of prism required to centre the light reflex in the squinting eye equals the amount of squint in prism dioptres. To avoid errors from parallax, the examiner must observe the corneal reflex with one eye by sitting directly in front of the deviating eye while keeping his other eye closed.
In an alternative method, prism of increasing power can be placed in front of the deviating eye until the corneal reflexion is centred. However, since the observation of the corneal reflexion through prisms is difficult, therefore, the method described above is preferred.
Advantages of Krimsky's test.
•Since the test requires only that the patient
fixate the light, being entirely objective otherwise, it is useful in testing small children.
• It is quicker to perform than the prism cover test.
•It can be used in patients in whom the deviating eye has a low visual acuity or has lost central fixation.
Limitations of the Krimsky's test
. Since the angle kappa is included in the measurement, the test is inaccurate.
. It is impossible to perform the test for distance fixation, since the position of the examiner's head required to obtain an accurate observation prevents the patient from seeing the fixation light.
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Chapters
00:00 Start
00:33 Required instruments
00:43 Optical Principle
01:10 Procedure
01:47 Recording
01:57 Advantages of Krimsky test
02:25 Limitations of the Krimsky test
02:44 Video Making
03:15 Video Credit
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[@praveenkumar-ic4qe]

Very good description 👍

[@OptometryAcademy]

Thank you 😊

[@aaravkumar7358]

👍

[@poonampriya3314]

Good 👍

[@advanceretina9144]

too good explanation :)

[@darkworld1358]

thank you for this video , it is the best💝💝💝💝💝💝

[@rakeshgowdamr]

Plzz mam don't do videos in hindi
Do in English

[@OptometryAcademy]

Thank you for your advice sir 😊
Some of my subscriber wants video in hindi. That's why I made this video in both Hindi and English languages