Background:~Accurate detection and interpretation of eye movement abnormalities often guides differential diagnosis and discussions on prognosis. Therefore, adequate diagnosis permits to direct treatment of disabling visual symptoms and signs. A comprehensive clinical eye movement examination is high yield from a diagnostic standpoint; however, skilful recording and quantification of eye movements can increase detection of subclinical deficits, confirm clinical suspicions, guide therapeutics, and generate expansive research opportunities.~Recently, many technologies, allowing objective measurements, have been developed. The most commonly used eye movement measurement technique is the high frequency video camera (Eye tracker).~In this context, SIERRA NEUROVISION has developed the S360, a medical device software using the infrared video-oculography technology. It is intended to collect data for orthoptics and neuro-visuo-motor analysis. It records the patient's eye movements, displays the patient's scoring next to normative values retrieved from literature and widely used in the current practice.~Design:~The study is cross-sectional, interventional, open label, single-arm, comparative and single-center study.~This study is a pre-marketing, confirmatory research which is performed in order to evaluate the performance and the safety of S360 MDSW compared to the standard of care procedure.~Intervention:~As the current study is cross-sectional, no follow-up visits related to the study are planned. All study procedures will be carried out during the inclusion visit which will take place during the patient's medical visit as part as his/her standard of care.~The study will be conducted in two parts:~Part 1 : standard of care measurements.~CISS (Screening for convergence insufficiency) questionnaire completion~Eye movements measurements using the standard tools used by the orthoptist (a prism bar, a penlight and a video projector, etc).~A first diagnosis based on the interpretation of the results provided by the standard of care measurements will be established by a first evaluator (orthoptist).~Part 2: S360 measurements~- Eye movements measurements using the medical device software S360. A second diagnosis based on the interpretation of the outcomes provided by the MDSW S360 will be established by a second evaluator (orthoptist).~The two measurements procedures are performed in two different examination rooms by two different operators. The diagnoses are established by two different investigators (orthoptist).
The aim of this interventional, cross-sectional study is to evaluate the performance and the safety of the medical device software S360. This clinical investigation is performed in order to demonstrate the conformity of the medical device, when operating under the normal conditions of its intended use, in accordance with the General Safety and Performance Requirements pertaining to clinical evaluation of the device regarding the Medical Device Regulation (MDR) 2017/745 (EU).