RHPRG4 FOR THE TREATMENT OF OCULAR GRAFT-VERSUS-HOST DISEASE (OGVHD)

Inclusion Criteria: Diagnosis and Main Criteria for Inclusion: All to be queried and checked at the screening visit (V1): 1. Subjects 18 years of age or older; 2. Subjects diagnosed with oGVHD for at least 3 months (current use of artificial tears for the treatment of GVHD); 3. VAS Eye Dryness (100-point scale) score ≥ 60 mm; 4. Tear Osmolarity ≥ 312 in either eye; 5. Corneal staining score with fluorescein ≥ 2 using the Oxford scale in the worst performing eye; staining must include quadrants beyond only inferior or superior staining; 6. Only subjects who satisfy all Informed Consent requirements may be included in the study. Exclusion Criteria: Diagnosis and Main Criteria for Exclusion: 1. Evidence of an active ocular infection in either eye; 2. History or presence of ocular surface disorders not related to oGVHD in either eye, including but not limited to significant conjunctivochalasis, superior limbic keratoconjunctivitis, limbal stem cell deficiency, allergic conjunctivitis, giant papillary conjunctivitis, atopic keratoconjunctivitis, anterior basement membrane dystrophies, neurotrophic keratitis, corneal dystrophy, exposure keratitis and moderate to severe blepharitis; 3. History of any ocular surgery (including laser or refractive surgical procedures) in either eye within 90 days before study enrollment. Ocular surgery will not be allowed during the study treatment period and elective ocular surgery procedures should not be planned during the duration of the follow-up period; 4. Initiation of new therapeutic modalities within 30 days of recruitment; 5. Artificial rescue tears are allowed as long as they are recorded in a diary; 6. Known hypersensitivity to one of the components of the study or procedural medications; 7. Participation in another clinical study at the same time as the present study or within 60 days of screening/baseline visit; 8. History of drug, medication or alcohol abuse or addiction; 9. Females of childbearing potential (those who are not surgically sterilized or post-menopausal for at least 1 year) are excluded from participation in the study if they meet any one of the following conditions: 1. are currently pregnant or, 2. have a positive result on the urine pregnancy test at the Screening/Baseline Visit or, 3. intend to become pregnant during the entire course of and 30 days after the study treatment periods, or, 4. are breast-feeding or, 5. not willing to use highly effective birth control measures, such as: Hormonal contraceptives - oral, implanted, transdermal, or injected and/or mechanical barrier methods, during the entire course of and 30 days after the study treatment periods.