In this prospective, Phase 2, randomized, double-masked, vehicle controlled study, approximately 60 eligible subjects will be randomized 1:1 to receive either TL-925 or placebo as topical ophthalmic eye drops administered bilaterally.

The study comprises of a screening and treatment period using the conjunctival allergen challenge model to evaluate TL-925 for the treatment of allergic conjunctivitis.

Inclusion Criteria:

• Individuals aged 18 years or older
• Female subjects of childbearing potential and their male partners must both use a highly effective contraception method during the study.
• Documented history of ocular allergies and a positive skin test reaction to a seasonal (grass, ragweed, tree pollen) or perennial (cat dander, dog dander, dust mites, cockroach) allergen as confirmed by an allergic skin test conducted at Visit 1 or within the past 60 months.
• Calculated best-corrected visual activity
• Positive bilateral CAC reaction

Exclusion Criteria:

• Any systemic or ocular disease currently producing ocular redness and/or ocular discomfort, or that may interfere with the conduct of the study.
• Any ocular surgical intervention within the last 3 months OR refractive surgery within the last 6 months
• Any ongoing ocular infection (bacterial, viral or fungal)