Скачать с ютуб Prism Bar Cover Test | Prism Cover Test | PBCT | PCT | Squint | Strabismus в хорошем качестве

Prism Bar Cover Test | Prism Cover Test | PBCT | PCT | Squint | Strabismus

Whatsapp Channel Link https://whatsapp.com/channel/0029VaAu... Follow me on telegram t.me/optometryacademyak Facebook page link   / optometryacademy   The prism Bar cover test (PBCT), is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. It is used by orthoptists and ophthalmologists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. Manifest is defined by the eye deviating constantly or intermittently, whereas latent is where the deviation is normally controlled but becomes present when the eyes are dissociated. A PBCT reveals the total deviation and cannot distinguish between latent and manifest strabismus as you are using an alternate cover test. Required instruments A number of different instruments are required when performing a PBCT. • Horizontal and vertical prism bars (or loose prisms). • An occluder • Near accommodative target. For example, near fixation stick • Distance target. For example, most commonly a Snellen chart is utilised In order to perform a PBCT, you must first perform a cover test as this gives an estimation of the size of the strabismus, thus an approximate starting point on the prism bar. You can also get an indication of presence and type of strabismus by observing the patients’ eye and observing corneal reflections, also known as Hirschbergs. It also shows whether the patient has a manifest or latent deviation. If a manifest deviation is present, it reveals which eye has the deviation or if it is alternating between both eyes. The prism bar cover test must be conducted at near (33 cm), at distance (6m) and if necessary at greater than 6 metres. Before commencing the test, ensure the patient is sitting upright with their chin and head straight. Patients with a head tilt (abnormal head posture) are ‘not formally controlled by using a bite bar or chin rest’ and are always tested with their head tilt and then without their head tilt The results leading on from the cover test will give you an indication of the type of deviation and which way you should hold your prism for the next stage of the test. Either BASE IN for an exodeviation (eye turned out), BASE OUT for an esodeviation (eye turned in), BASE UP for a hypodeviation (eye turned down) or BASE DOWN for a hyperdeviation (eye turned up). Chapters 00:00 Start 01:00 Required instruments 02:59 Method 05:26 How To Record Findings 07:06 Considerations while doing PBCT 08:07 Indicated in 08:37 Not indicated in 09:08 Video Making 09:40 Video Credit prism bar cover test, prism bar cover test ppt, prism bar cover test pdf, strabismus, strabismus meaning, strabismus surgery, strabismus treatment, strabismus eyes, treatment for strabismus, strabismus vs squint, strabismus symptoms, strabismus causes, causes of strabismus, strabismus definition, symptoms of strabismus, strabismus of the eyes, types of strabismus, type of strabismus, strabismus types, strabismus ppt, amblyopia strabismus, what is strabismus, strabismus amblyopia, squint meaning, squint eyed, squint eye, eyes squint, squint eyes, squint in eyes, squint of eye, squint eyes meaning, squint eye meaning, squint eyed meaning, meaning of squint eyes, eye exercises for squint, squint eye exercise, squint eye treatment, squint eye exercises, squint in eyes means, treatment of squint eyes, squint eye surgery #PrismBarCoverTest #optometrists #optometryacademy #optometry #opthalmology #orthoptist #strabismologist #eye_care #eyes #paresis #near #eyehealth #eyeball #strabismus #squintyeyes #squints #amblyopia #optom #strabismus #stereopsis #steroacuity #stereopsis #prism #convergence #glasses #diplopia #suppression #synoptophore #AkleshKumar #MaddoxRod #Prism #PBCT #PCT#Esotropia #Exotropia #Hypertropia #Hypotropia