TITLE

Stereopsis with TNO and Titmus Tests in Symptomatic and Asymptomatic University Students

AUTHOR(S)
Momeni-Moghadam, Hamed; Kundart, James; Ehsani, Marzieh; Gholami, Khatereh
PUB. DATE
March 2012
SOURCE
Journal of Behavioral Optometry;2012, Vol. 23 Issue 2, p35
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Introduction: One factor in the evaluation of binocular vision is the measurement of stereopsis. Several methods are available for this purpose. The most common procedures are anaglyphic (with use of red-green filters) and vectographic (with use of polarized filters) procedures. The purpose of this study is the determination of stereopsis with local (Titmus) and global (TNO) tests in symptomatic and asymptomatic subjects with respect to type of disparity (crossed and/or uncrossed) in exophoric and esophoric subjects. Methods: In this cross-sectional study, 174 randomly selected students of Zahedan University of Medical Sciences served as subjects. Subjects were divided into symptomatic and asymptomatic groups according to the presence or absence of binocular vision symptoms. Dissociated heterophoria was determined with use of the alternate prism cover test and stereopsis with the TNO and Titmus tests. Results: The mean stereopsis with the TNO test in symptomatic and asymptomatic subjects with crossed disparity presentation of the stereo test was 133.1 ± 68.6 and 76.7 ± 81.9 sec arc, respectively. The stereopsis with the TNO test in symptomatic and asymptomatic subjects with uncrossed disparity presentation of the stereo test was 135.0 ± 66.0 and 83.2 ± 49.3 sec arc, respectively. With the Titmus test, the mean stereopsis with crossed disparity presentation of the stereo test in symptomatic and asymptomatic subjects was 44.3 ± 7.1 and 40.7 ± 3.3 sec arc, respectively, and with uncrossed disparity presentation of the stereo test 50.0 ± 11.8 and 40.0 ± 0.0 sec arc, respectively. The Mann- Whitney U test showed a statistically significant difference in stereopsis (with both presentations of the test) between the two groups (p<0.05). The difference in stereopsis between esophoric and exophoric subjects was between 30-60 arc seconds for global stereopsis, and less than 2 arc seconds for local stereopsis. Esophoric subjects generally had a higher threshold for symptoms. However, these differences were not statistically significant (p>0.05). The best cutoff points for distinguishing between symptomatic and asymptomatic subjects with the TNO and Titmus stereo tests were determined to be 90 and 45 seconds of arc, respectively. Conclusion: Stereopsis is a useful factor in distinguishing between symptomatic and asymptomatic individuals. For that purpose, a global test was more useful than a local test. Specifically, symptomatic subjects could be detected at a higher (90 arc sec) threshold with random-dot stereopsis than the 45 arc sec symptom threshold with Titmus-type stereopsis. Half of esophoric patients and only approximately a quarter of exophoric patients were symptomatic.
ACCESSION #
75948244

 

Related Articles

  • Ocular Biometry in Angle Closure. Reza Razeghinejad, Mohammad; Banifatemi, Mohammad // Journal of Ophthalmic & Vision Research;Jan2013, Vol. 8 Issue 1, p17 

    Purpose: To compare ocular biometric parameters in primary angle closure suspects (PACS), primary angle closure glaucoma (PACG) and acute primary angle closure (APAC). Methods: This cross-sectional study was performed on 113 patients including 33 cases of PACS, 45 patients with PACG and 35...

  • Scheimpflug Imaging Criteria for Identifying Eyes at High Risk of Acute Angle Closure. Pakravan, Mohammad; Sharifipour, Farideh; Yazdani, Shahin; Koohestani, Nasim; Yaseri, Mehdi // Journal of Ophthalmic & Vision Research;Apr2012, Vol. 7 Issue 2, p111 

    Purpose: To compare anterior segment and ocular biometric parameters in unaffected fellow eyes of patients with a previous attack of acute angle closure (AAC), primary angle closure suspect (PACS) eyes, and normal eyes; and to identify eyes at high risk of AAC among primary angle closure...

  • Examining Diagnostic Value of the Fasting Plasma Glucose in Screening Gestational Diabetes. Mirfeizi, Mani; Toorzani, Zahra Mehdizadeh; Jafarabadi, Mohammad Asghari; Shoghi, Mahnaz; Gholami, Mohammad Javad; Tekmehdash, Ali Moniri // Iranian Journal of Diabetes & Lipid Disorders;2011, Vol. 10, p1 

    Background: Many different tests have been introduced for screening gestational diabetes mellitus (GDM). The Objectives of this study were to determine both the diagnostic value of fasting plasma glucose (FPG) and the suitable cut-off point of plasma glucose with the best sensitivity and...

  • Evaluation of Psychometric Aspects of Cleveland Scale of Activity Daily Living in the Diagnosis of Dementia in Iran. Noroozian, Maryam; Poormand, Zahra; Farzad, Vali Allah; Hadjati, Gholamreza; Baghdasariyans, Anita // Iranian Journal of Public Health;Apr2013, Vol. 42 Issue 4, p417 

    Background: The purpose of this study was to design a valid questionnaire to the Iranian culture for dementia diagnosis and more specifically in its early stage. Methods: A cross-sectional study was conducted in 2012 in Memory Clinic of Roozbeh Hospital and Iranian Alzheimer Association in...

  • Can Serum Ferritin Level Predict Disease Severity in Patients with Crimean-Congo Hemorrhagic Fever? Metanat, Maliheh; Sharifi-Mood, Batool; Tabatabaei, Mehdi; Sarraf-Shirazi, Mohammad // Eurasian Journal of Medicine;Jun2013, Vol. 45 Issue 2, p108 

    Objective: Crimean-Congo hemorrhagic fever (CCHF) is an acute viral disease. Several factors have already been suggested to explain the pathogenesis as well as predict the disease severity. In our study we aim to investigate the role of serum ferritin level as a possible predicting factor of...

  • The role of urinary TIMP1 and MMP9 levels in predicting vesicoureteral reflux in neonates with antenatal hydronephrosis. Mohammadjafari, Hamid; Rafiei, Alireza; Abedi, Mohammad; Aalaee, Abdolrasul; Abedi, Ehsan // Pediatric Nephrology;May2014, Vol. 29 Issue 5, p871 

    Background: Antenatal hydronephrosis (AH) is commonly found on evaluation of pregnant women and 20-30 % of neonates have vesicoureteral reflux (VUR). In order to diagnose VUR, we required invasive testing and exposure of the neonate to radiation. The concentrations of a matrix metalloproteinase,...

  • Desobstrução ineficaz de vias aéreas em crianças com infecção respiratória aguda. Andrade, Lívia Zulmyra Cintra; de Moura, Karine Kerla Maia; Chaves, Daniel Bruno Resende; da Silva, Viviane Martins; de Oliveira Lopes, Marcos Venícios // Revista Eletronica de Enfermagem;jan-mar2014, Vol. 16 Issue 1, p21 

    This cross-sectional study was performed with 151 children inpatients of a pediatric hospital in Northeastern Brazil, with the objective to analyze the accuracy of the defining characteristics of the diagnoses ineffective airway clearance in children with acute respiratory infection. A thorough...

  • Refractive errors among 7-16 year old children. Albashtawy, Mohammed; Hameed, Sinan; Mansi, Kamal; Aljezawi, Ma¿en; Tubaishat, Ahmad // British Journal of School Nursing;Sep2012, Vol. 7 Issue 7, p350 

    The article reports on a study that aimed to give school nurses better insight into the prevalence of refractive errors (RE) in children aged 7-16 years in Jordan's Mafraq Governate and determine how it compared with other Jordanian provinces and internationally. Results revealed a significant...

  • Extra-pulmonary tuberculosis: a biomarker analysis. Fortún, J.; Martín-Dávila, P.; Gómez-Mampaso, E.; Vallejo, A.; Cuartero, C.; González-García, A.; Rubí, J.; Pallarés, E.; Moreno, S. // Infection;Aug2014, Vol. 42 Issue 4, p649 

    Introduction: Studies on biomarkers in tuberculosis are focused on pulmonary forms of this disease (PTB), and only limited information is currently available on biomarkers of extra-pulmonary tuberculosis (EPTB). Methods: Serum samples from 24 patients with PTB, 29 patients with EPTB and 27...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics