4 Prism Base Out Test

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The Four Prism Dioptre Reflex Test (also known as the 4 PRT, or 4 Prism Dioptre Base-out Test), is an objective, non-dissociative test used to prove the alignment of both eyes (i.e. the presence of binocular single vision) by assessing motor fusion.Through the use of a 4 dioptre base out prism, diplopia is induced which is the driving force for the eyes to change fixation and therefore re-gain bifoveal fixation meaning, they overcome that amount of power.
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Опубликовано:

6 окт 2024

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Комментарии : 69

@crocketmeow 5 лет назад

The light refracts more toward the base. The image is displaced toward the apex. Other than that, great explanation of the 4 BO test.

@AbhishekSingh-lu8tw 3 года назад

Eye moves towards base??

@Asadkhan-pf4hy 10 месяцев назад

@@AbhishekSingh-lu8twyes

@sunandasanyal405 4 года назад

@optometry academy, there is a small correction needed at 1:29 time lapse, image displace to APEX of prism, not to BASE, whereas Ray optics do the opposite.

@OptometryAcademy 4 года назад

Yes. Ma'am, I already accepted this mistake. It is mentioned in the comment section by me.😊

@sayantanipurkayastha7276 3 года назад

Explained so beautifully and clearly thank you❤️

@OptometryAcademy 3 года назад

Thank you 😊

@jayangwangdue2879 3 года назад

Thankyou for the upload. Especially the recording part was so helpful

@OptometryAcademy 3 года назад

Thank you 😊

@anjanikumari4155 4 года назад

Plz upload video about prism dispensing.........plz as soon as possible......this topic is tooo much difficult for me to understand.....plz help

@ambalikaghosh2251 2 года назад

Thank you for sharing this important content ☺️❤️

@optomak2356 5 лет назад

Now i can use 4 prism. Happy to watch this.

@OptometryAcademy 5 лет назад

Thank you

@walidyaman7549 3 года назад

Thank you very much about your videos. Can you please make a video about how to mesure strabismus angle with different methods ? Thank you very much in advance

@bigyanbhusal6051 3 года назад

so beautifully explained thank you .

@OptometryAcademy 3 года назад

Thank you 😊

@Maryam_Ahsan 3 года назад

Image displacement is towards the apex of the prism not towards the base of prism. Make a correction please! Other than that, video is very informative. ✅

@sindhujaaful 2 года назад

Thank you. Very clearly explained

@subhadeep55 4 года назад

Could have plz explained the use of this test for microtropia also. Rest for suppression scotoma its a good explanation

@OptometryAcademy 4 года назад

Diagnosis of a microtropia was determined by the following criteria: (1) Cover test revealing only a latent deviation or no deviation, in patients with microtropia with identity, or a small manifest deviation in microtropes without identity, measuring