A 48 Week Study to Evaluate the Efficacy and Safety of Two (2) EYS606 Treatment Regimens in Subjects With Active Chronic Non-infectious Uveitis (CNIU)

A 48 Week Phase II, Randomized, Open-Label, Multicenter, Study to Evaluate the Efficacy and Safety of Two (2) EYS606 Treatment Regimens in Subjects With Active Chronic Non-infectious Uveitis (CNIU)

The objective of the study is to evaluate the efficacy and safety of two different treatment regimens of EYS606.

This is a Phase 2, multi-center, randomized open-label interventional study of EYS606 in subjects with active chronic non-infectious uveitis.

The maximum study duration per patient is 51 Weeks (including an up to 3 week screening period + 48 weeks follow-up after treatment).

The study will be conducted in 2 parts. Part I is a safety cohort phase that will enroll up to 6 subjects, Part II is the randomized comparison phase that will enroll up to an additional 50 subjects.

Key Eligibility Criteria:

1. Subject must be 18 years of age or older.

2. Subject must have a diagnosis of chronic non-infectious uveitis of any anatomic subtype (anterior, intermediate, posterior or panuveitis).

3. Subject must have a history of chronic or recurrent non-infectious uveitis requiring or having required treatment with corticosteroids (systemic, periocular or intraocular) and/or systemic immunosuppressive medication(s) in the 12 months prior to the screening visit.

4. Best corrected visual acuity of

   • Study Part I: ≥ 5 and < 67 ETDRS letters in the study eye (equivalent to less than or equal to 20/50 but better than or equal to 20/800 Snellen).
   • Study Part II: ≥ 5 and < 77 ETDRS letters in the study eye (equivalent to less than or equal to 20/32 but better than or equal to 20/800 Snellen).

5. At the screening and baseline visits subject must have active chronic non-infectious uveitis as evidenced by at least one or more of the following in the study eye:

   • Active retinal vasculitis (retinal vascular leakage) involving the posterior pole confirmed by the reading center.
   • Vitreous haze grade ≥ 2+ (SUN classification).
   • Anterior chamber cell grade ≥ 2+ (SUN classification); anterior chamber cells must be present for subjects with a diagnosis of chronic anterior non-infectious uveitis.
   • Persistent macular edema (defined as central retinal thickness (CRT) > 300 microns or > 320 microns using Zeiss Cirrus and Topcon or Heidelberg Spectralis spectral domain ocular coherence tomography (SD-OCT) instruments, respectively) despite treatment with corticosteroids and/or immunosuppressive therapy for at least 4 weeks prior to screening.

6. Subject receiving concomitant topical and/or systemic corticosteroids or allowed systemic immunosuppressive medications must have maintained the same treatment regimen (dosage/frequency) for at least 2 weeks prior to the baseline (V1) visit, (if applicable).