How to Perform a Basic Cover Test in Ocular Misalignment or …
2015年4月24日 · This test is performed in the same manner as the single cover test except that attention is turned to the eye that has been occluded as the occluder is pulled away. If the uncovered eye does not show a fixation shift as the occluder is placed, but as the occluder is pulled away, the covered eye shows a refixation movement once binocular ...
Cover test - University of Iowa
2017年1月12日 · Cover test. Richard C. Allen, MD, PhD, FACS Additional Notes: Length 00:50. In the cover test, the examiner is determining if the patient has a tropia or not. The eye is covered with an occluder and then uncovered. During this maneuver, each eye is examined closely to see if there is any horizontal or vertical movement.
INTERMITTENT EXOTROPIA: A Major Review - University of Iowa
2006年1月19日 · A prolonged alternate cover testing should be used in patients with intermittent exotropia to suspend tonic fusional convergence. If after prolonged alternate cover testing, there is significant angle variability or a significant distance/near discrepancy, then a …
Cranial Nerve IV (Trochlear Nerve) Palsy - University of Iowa
2015年11月10日 · DIAGNOSIS. Traumatic right cranial nerve (CN) IV palsy. CLINICAL COURSE. Given the acute, painless onset of the vertical diplopia with a positive Parks-Bielschowsky 3-step test (see "Clinical Features and Evaluation," below) for a right CN IV palsy in the absence of vascular risk factors, negative neuroimaging, and in the setting of recent closed head trauma – the diagnosis of traumatic ...
Monofixation Syndrome: - University of Iowa
2015年2月23日 · Cover testing: In patients too young to perform sensory testing, monofixation syndrome can be suspected if there is a small tropia of less than 10 PD elicited by cover-uncover testing that builds to a larger angle phoria as they are dissociated and broken-down with alternate cover testing to show the full deviation. The presence of a phoria is ...
Thyroid Eye Disease, workup and diagnosis - University of Iowa
2016年11月18日 · Orbital myositis is not generally associated with eyelid retraction. OM is usually unilateral. A bilateral presentation would be unusual for OM, whereas TED can present either way. Orbital tumors – Orbital tumors are typically unilateral in presentation and can cause proptosis and a wide variety of motility disturbances depending on location ...
Atlas Entry - The Effect of Hering's Law in Ptosis - University of Iowa
Clark TJE, Klejch WJ, Wang K, Allen RC, Nerad JA, Carter KD, Shriver EM. Hering's Law in Congenital Ptosis: Evaluation of the Contralateral Response to Unilateral Congenital Ptosis Repair. Ophthalmic Plast Reconstr Surg 2018;34(3):284-290. https://PubMed.gov/28723733. DOI: 10.1097/iop.0000000000000951
Confrontation visual field testing - University of Iowa
2017年1月12日 · Confrontation visual field testing. Richard C. Allen, MD, PhD, FACS Additional Notes: Length 00:27. Confrontation visual field testing involves having the patient looking directly at your eye or nose and testing each quadrant in the patient's visual field by having them count the number of fingers that you are showing.
Unilateral Retinitis Pigmentosa: - University of Iowa
2008年5月8日 · In order to make a reliable diagnosis of unilateral retinitis pigmentosa, it is necessary to rule out as best as possible all other explanations, confirm clinical signs of RP are truly unilateral, and follow the patient for an extended period (at least 5 years) to rule out the possibility of asymmetric inherited RP.
EyeRounds Glossary - University of Iowa
2018年2月14日 · An alternate prism cover test is used to determine the full amount of ocular misalignment (strabismus) in a patient. To perform this test, one eye is occluded, and then the other, with a prism held over the non-fixating eye. The prism must be held in the appropriate direction for the deviation (e.g., base out prism for an esodeviation).