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vertical heterophoria

Eric Matheron, Ava Zandi, Danping Wang, Zoï Kapoula
Clinical studies in non-specific chronic arthralgia and back pain seem to indicate an association between vertical heterophoria (VH - latent vertical retinal misalignment) and asymmetrical head rotation. Such clinical observations suggest a link between VH and head rotation, but this was never tested. The purpose of this study was to simulate a VH in healthy subjects and examine its influence on the amplitude of active head rotation during 3D motion capture in upright stance. Subjects were asked to rotate their head three times from the straight ahead position and then to the right, back to straight ahead, to the left, and back to the straight ahead again...
2016: Frontiers in Neurology
Mark S Rosner, Debby L Feinberg, Jennifer E Doble, Arthur J Rosner
PRIMARY OBJECTIVE: To examine the effectiveness of neutralizing prismatic lenses for reduction of headache, dizziness and anxiety in patients with persistent post-concussive symptoms and vertical heterophoria (VH). BACKGROUND: Approximately 5-10% of patients with traumatic brain injury (TBI) develop persistent post-concussive symptoms. Many rehabilitation/treatment modalities are tried, but are largely unsuccessful, indicating a need for more effective treatment...
2016: Brain Injury: [BI]
Patrick Quercia, Madeleine Quercia, Léonard J Feiss, François Allaert
In this study, we looked for the presence of vertical heterophoria (VH) in 42 dyslexic children (22 males and 20 females) aged 118.5±12.9 months who were compared with a control group of 22 nondyslexic children (eleven males and eleven females) aged 112±9.8 months. Dyslexics presented a low-level (always <1 prism diopter) VH combined with torsion. This oculomotor feature clearly separates the dyslexic group from the normal readers group. It is independent of the type of dyslexia. The essential feature of this VH is a lability that appears during specific stimulation of sensory receptors involved in postural regulation...
2015: Clinical Ophthalmology
Lisa Asper, Andrew Leung, Catrin Tran, Catherine M Suttle, Kathleen Watt
PURPOSE: Vertical yoked prisms (VYPs) have been recommended for the remediation of vergence dysfunction, but the evidence base for their use is mostly low level. This study investigates the effect of VYP on horizontal subjective dissociated heterophoria. METHODS: Phoria measurement was performed in primary gaze with the Modified Thorington technique at 3 m and at 40 cm on 40 nonpresbyopic young adults. Subjects were seated and head position was held constant. Baseline measures (without yoked prism) of distance and near phoria were measured...
October 2015: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Ken Steinegger, Raoul De Haller, Delphine Courvoisier, Paolo Scolozzi
The aim of this study was to prospectively assess the prevalence of orthoptic anomalies following conservative management of pure blowout orbital fractures and to evaluate their clinical relevance. Clinical and radiologic data of patients with unilateral conservatively managed pure blowout orbital fractures with a minimum follow-up of 6 months were reviewed. Eligible patients were contacted and invited to undergo an extended ophthalmologic examination as follows: distance and near visual acuities, Hertel exophthalmometry, corneal light reflex (Hirschberg test), ductions and versions in the 6 cardinal fields of gaze, eye deviation with prisms and alternate cover test in all of the 9-gaze directions with Maddox rod, degrees of incyclo/excyclotorsion with right and left eye fixation, horizontal and vertical deviation with Hess-Weiss coordimetry, degree of horizontal/vertical and incyclo/excyclotorsion deviation with Harms wall deviometry, and vertical deviation with Bielschowsky head-tilt test...
July 2015: Journal of Craniofacial Surgery
Eric Matheron, Zoï Kapoula
Vertical heterophoria (VH) is the latent vertical misalignment of the eyes when the retinal images are dissociated, vertical orthophoria (VO) when there is no misalignment. Studies on postural control, during binocular vision in upright stance, reported that healthy subjects with small VH vs. VO are less stable, but the experimental cancellation of VH with an appropriate prism improves postural stability. The same behavior was recorded in nonspecific chronic back pain subjects, all with VH. It was hypothesized that, without refraction problems, VH indicates a perturbation of the somaesthetic cues required in the sensorimotor loops involved in postural control and the capacity of the CNS to optimally integrate these cues, suggesting prevention possibilities...
2015: Medical Hypothesis, Discovery and Innovation in Ophthalmology
Joseph L Demer, Robert A Clark
Vertical fusional vergence (VFV) normally compensates for slight vertical heterophorias. We employed magnetic resonance imaging to clarify extraocular muscle contributions to VFV induced by monocular two-prism diopter (1.15°) base-up prism in 14 normal adults. Fusion during prism viewing requires monocular infraduction. Scans were repeated without prism, and with prism shifted contralaterally. Contractility indicated by morphometric indexes was separately analyzed in medial and lateral vertical rectus and superior oblique (SO) putative compartments, and superior and inferior horizontal rectus extraocular muscle putative compartments, but in the whole inferior oblique (IO)...
April 1, 2015: Journal of Neurophysiology
Arie Y Nemet, Ori Segal, Michael Mimouni, Shlomo Vinker
PURPOSE: To report the incidence, demographics, and associations of various conditions among patients with pediatric ptosis. METHODS: A retrospective, observational case-control study of patients (birth-18 years; n = 2,408) diagnosed with pediatric ptosis in 1/2003-12/2012. Age- and gender-matched control patients (n = 9,632) were randomly selected from the district members. Medical and socio-demographic information were extracted from electronic medical records...
September 2014: Graefe's Archive for Clinical and Experimental Ophthalmology
Muriel Dysli, Nicolas Vogel, Mathias Abegg
PURPOSE: Dyslexia is the most common developmental reading disorder that affects language skills. Latent strabismus (heterophoria) has been suspected to be causally involved. Even though phoria correction in dyslexic children is commonly applied, the evidence in support of a benefit is poor. In order to provide experimental evidence on this issue, we simulated phoria in healthy readers by modifying the vergence tone required to maintain binocular alignment. METHODS: Vergence tone was altered with prisms that were placed in front of one eye in 16 healthy subjects to induce exophoria, esophoria, or vertical phoria...
2014: Frontiers in Human Neuroscience
Constance E West, David G Hunter
Induced prism in spectacle lenses, which may result from inadvertent displacement of optical centers, may worsen an existing heterophoria or even cause diplopia, yet over-the-counter reading glasses (OTC readers) are not always assessed by clinicians when evaluating patients with diplopia or asthenopia. To gauge the magnitude of this potential problem, we used a focimeter and prescription aligner to assess the frequency and extent of clinically significant manufacturing variations in a random selection of 160 OTC readers...
June 2014: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
Lori Ann F Kehler, Lisa Fraine, Pengcheng Lu
PURPOSE: It has been suggested that children perceptually adapt to changes in retinal image size in the presence of anisometropia and therefore do not display clinically significant aniseikonia. However, given that early methods of eikonometry were not child-friendly, the prevalence of this condition in children is poorly understood. Retinal image size differences may be relevant in the discussion of amblyogenesis. The computer-based Aniseikonia Inspector Version 3 (AI3) uses a simple, forced-choice method and includes calibration for heterophoria...
May 2014: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Jenny M Bosten, Ruth E Hogg, Gary Bargary, Patrick T Goodbourn, Adam J Lawrance-Owen, John D Mollon
PURPOSE: We conducted a genome-wide association study to identify genetic factors that contribute to the etiology of heterophoria. METHODS: We measured near and far vertical and horizontal phorias in 988 healthy adults aged 16 to 40 using the Keystone telebinocular with plates 5218 and 5219. We regressed degree of phoria against genotype at 642758 genetic loci. To control for false positives, we applied the conservative genome-wide permutation test to our data. RESULTS: A locus at 6p22...
January 2014: Investigative Ophthalmology & Visual Science
Matej Skrbek
We've been finding possible association of central vision damage with binocular vision disorders in our clients suffering from age-related macular degeneration (ARMD), but whose visual acuity still allowed us to examine their binocular vision. Our findings show that there is a significant number of patients with heterophoria in horizontal, as well as vertical direction. The clients rate the vision with prismatic correction as more comfortable, clearer and long-term tolerable. Getting used to prismatic correction was spontaneous and non-problematic...
April 2013: Collegium Antropologicum
Danielle N Jackson, Harold E Bedell
Motion sickness is reported to be a common symptom in patients with vertical heterophoria. The goal of this study was to assess the relationship between vertical phoria and susceptibility to motion sickness in a nonclinical sample of 43 subjects. Vertical phoria was measured with a Maddox rod after 30 s of occlusion. To evaluate susceptibility to motion sickness, subjects read text while sitting inside a rotating optokinetic drum for 10 min. Subjects rated their level of motion sickness at 1 min intervals during drum rotation and the magnitude of 13 motion sickness symptoms after drum rotation ended...
March 2012: Strabismus
Eric Matheron, Zoï Kapoula
The purpose of this study was to test postural control during quiet standing in nonspecific chronic low back pain (LBP) subjects with vertical heterophoria (VH) before and after cancellation of VH; also to compare with healthy subjects with, and without VH. Fourteen subjects with LBP took part in this study. The postural performance was measured through the center of pressure displacements with a force platform while the subjects fixated on a target placed at either 40 or 200 cm, before and after VH cancellation with an appropriate prism...
2011: PloS One
C Akkin, H Cengiz, S Köse, K Pamukçu
PURPOSE: To investigate the relationship between intraocular lens (IOL) malposition and quality of binocular single vision following uncomplicated extracapsular cataract extraction and posterior chamber IOL implantation. METHODS: Fifty-two bilaterally pseudophakic patients were included. The main outcome measures were visual acuity, stereoscopic acuity, horizontal and vertical amplitudes of fusion and heterophoria, tilting angle and decentration amount of the pseudophacos and summation of these values in somewhat vectorial manner to define the total decentration and tilt of IOLS...
1994: Strabismus
David G Telander, Brent M Egeland, Stephen P Christiansen
PURPOSE: To determine the frequency and distribution of horizontal misalignment in patients with unilateral superior oblique palsy (SOP) and to determine the indications for combining horizontal with vertical strabismus surgery. METHODS: Patients included in the study had a vertical heterophoria or tropia that fit Parks three-step test for SOP and had no previous strabismus surgery or other ocular motility disturbance. Ocular motility and alignment were recorded...
March 2011: Journal of Pediatric Ophthalmology and Strabismus
Jennifer E Doble, Debby L Feinberg, Mark S Rosner, Arthur J Rosner
OBJECTIVE: To identify a form of binocular vision dysfunction (vertical heterophoria) in a traumatic brain injury (TBI) population and to assess the effect of individualized prismatic spectacle lenses on postconcussive symptoms. DESIGN: Retrospective study. SETTING: Private physical medicine and rehabilitation practice and private optometric practice. PATIENTS: A subset of TBI patients who were initially evaluated by a single physiatrist and who received standard treatments and medications yet had persistent postconcussive symptoms...
April 2010: PM & R: the Journal of Injury, Function, and Rehabilitation
S S Estermann, D Mojon
BACKGROUND: There is a lack of studies about how to proceed surgically in rare strabismus diseases. It was the aim of this study to interview experienced German-speaking strabismologists about how they perform surgery in rare but also some frequent strabismic conditions. The focus was on the choice of the technique, the timing, and the dosage. METHOD: A validated questionnaire was sent to 11 experienced strabismus surgeons. It contained questions about the following topics: congenital fibrosis syndrome, Jaentsch-Brown syndrome, intermittent exotropia, maximum dosage for rectus muscle surgery, Kestenbaum surgery, sixth nerve palsy, heterophorias, myokymia of the superior oblique muscle, thyroid endocrine orbitopathy, dissociated vertical deviation, adjustable sutures, advancement of previously recessed rectus muscles, retroequatorial myopiexia, and congenital esotropia...
June 2009: Klinische Monatsblätter Für Augenheilkunde
Eric Matheron, Zoï Kapoula
OBJECTIVE: To test the quality of postural performance in quiet upright stance in healthy young adults with vertical heterophoria (VH) within the normal range and without VH (vertical orthophoria, VO). METHODS: Twenty-six subjects took part in this study. The postural stability was measured with a force platform while the subjects fixated a target at eye level in a straight ahead position, placed at either 40 or 200cm. RESULTS: The results indicated that the postural control was better for subjects with VO than subjects with VH...
October 2008: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
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