The goal of this observational study is to determinate the association between DES and changes in binocular vision and ocular surface. in higher education students in the area of health technologies. The main questions it aims to determine the prevalence of Digital Eye Syndrome (DES); the association between DES and changes in binocular vision and ocular surface; whether the time of use and the type of electronic devices influences the degree and type of symptoms of DES; and to determine whether there is an association between the type of ametropia and the symptoms of DES. Participants will have to answer 3 questionnaires (the Computer Vision Syndrome Questionnaire; the Convergence Insufficiency Symptoms Survey, and the Dry Eye Questionnaire (DEQ-5)) and then they will perform an orthoptic assessment and an assessment of the ocular surface with the tear film Break Up Time (BUT) test.
Study Type
OBSERVATIONAL
Enrollment
400
Higher education students from health technologies field exposed to digital devices.
The orthoptic assessment is a non-invasive assessment that will last for 30 min to determine visual parameters related to binocular vision. It will be carried out by the research team in the orthoptics and vision sciences laboratories of the Lisbon School of Health Tecnology.
The BUT test is a tear film rupture assessment test that allows the stability of the tear film to be evaluated. To perform these tests, it is necessary to instill fluorescein and then it is observed in the slit lamp under illumination with a cobalt blue filter, to count the break-up time.
Escola Superior de Tecnologia de Saúde de Lisboa
Lisbon, Portugal
Prevalence of Digital Eye Syndrome
To verify the existence or absence of digital fatigue syndrome in higher education students. For this purpose, the Computer Vision Syndrome Questionnaire will be used. To verify the existence or not of digital fatigue syndrome in higher education. The Computer Vision Syndrome Questionnaire (CVS-Q) will be applied, which is composed of 16 x 2 questions, to assess the symptoms and their intensity. This questionnaire makes it possible to classifying CVS as asymptomatic and symptomatic.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Convergence Insufficiency Symptoms Survey
The main objective of this questionnaire is to assess the frequency of symptoms of visual discomfort and consists of fifteen questions. The answers to the questions are evaluated and allow classifying binocular vision into "norm", "suspected convergence insufficiency" and "convergence insufficiency".
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Dry Eye Questionnaire (DEQ-5)
The DEQ-5 questionnaire is the reduced version of the DEQ questionnaire that allows the assessment of dry eye. this questionnaire is made up of 5 questions and allows to obtain an answer score that classifies as "normal" and "dry eye".
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Far Visual Acuity
Visual acuity is the spatial resolution capability of the visual system. The unit of measurement for this variable will be the minimum resolution angle algorithm (LogMAR).
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Near Visual Acuity
Visual acuity is the spatial resolution capability of the visual system. The unit of measurement for this variable will be the minimum resolution angle algorithm (LogMAR).
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Far Cover Test
The cover test is one of the variables used to study the motor component of the visual system and is a categorical variable, which will allow the identification of latent and manifest ocular deviations.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Near Cover Test
The cover test is one of the variables used to study the motor component of the visual system and is a categorical variable, which will allow the identification of latent and manifest ocular deviations.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Near Stereopsis
Stereopsis is one of the binocular vision parameters and the measurement unit used will be the arc seconds.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Near Point of Convergence
The near point of convergence is one of the convergence assessment methods and the unit of measurement is cm.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Flexibility of Accommodation
The flexibility of accommodation is one of the accommodation evaluation parameters and its measurement unit is cycle per minute.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Amplitude of Accommodation
The amplitude of accomodation is one of the accommodation evaluation parameters and its measurement unit is diopters.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Far Convergence
The far convergence is one of the elements of fusional vergencies and its measurement unit is the prismatic diopters.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Near Convergence
The near convergence is one of the elements of fusional vergencies and its measurement unit is the prismatic diopters.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Near Divergence
The near divergence is one of the elements of fusional vergencies and its measurement unit is the prismatic diopters.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Far Divergence
The far divergence is one of the elements of fusional vergencies and its measurement unit is the prismatic diopters.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Break Up Time Test
The BUT Test will allow assessing the stability of the tear film and the unit of measurement will be seconds.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
Refrative Error
The refractive error will be assessed using the auto refratometer and your measurements will be in diopters.
Time frame: Immediately after subject enrollment, up to 1 week (single point collection)
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