The objective of this observational study is to develop new tools to assess primary Sjögren's syndrome (pSS) symptoms and to measure the severity of eye involvement in these patients.

All clinical trials evaluating the efficacy of immunomodulatory drugs in pSS are negative. This could be due to a lack of sensitivity of the outcome measures used so far to define the response. In this study, investigator will evaluate the feasability, tolerability, and performance of new tools to assess disease evolution:

• investigator will develop a webapp to measure the intensity of the symptoms at home on a daily basis (ecological assessment)
• investigator will evaluate new ophthalmologic procedures, already used in other conditions but never in pSS, which assess the severity of eye involvement in the disease
• investigator will develop an automated method to score the severity of ocular surface lesions in the disease.

Patients with a diagnosis of pSS will be included in the study, will undergo detailed ophtalmologic examination, and will then use a webapp, installed on their smartphone, to score their symptoms everyday during 3 months.

Inclusion Criteria:

• diagnosis of pSS according to ACR/EULAR classification criteria

Exclusion Criteria:

• patient does not possess a smartphone with web connection
• patient unable to sign an informed consent

Consecutive pSS patients seen in Rheumatology

All collected data that underlie results in a publication

Data will be available beginning after publication of result and ending three years maximum following the last visit of last patient

Data access requests will be reviewed by the internal committee of Brest UH. Requestors will be required to sign and complete a data access agreement.