METHODS FOR TREATING OCULAR SURFACE PAIN

1 .- 52 . (canceled)

53 . A method of treating chronic ocular surface pain in a subject in need thereof, comprising ocularly administering an effective amount of 4-(7-Hydroxy-2-isopropyl-4-oxo-4H-quinazolin-3-yl)-benzonitrile (Formula I) having structure:

or a salt, solvate, polymorph, or co-crystal thereof to the subject.

54 . The method of claim 53 , comprising administering the compound of formula I in a formulation at a concentration of about 0.5% w/v, about 1.0% w/v, about 1.5% w/v, about 2.0% w/v, about 2.5% w/v, about 3.0% w/v, or about 3.5% w/v.

55 . The method of claim 53 , comprising administering the compound of formula I at a total daily dose per eye of about 0.5 to about 3.5 mg, or about 0.5 mg, about 1.0 mg, about 1.5 mg, about 2.0 mg, about 2.5 mg, about 3.0 mg, or about 3.5 mg.

56 . The method according to claim 53 , wherein the subject suffers from one or more of dry eye disease, Sjogren's Syndrome, conjunctivitis (including keratoconjuctivitis, vernal keratoconjunctivitis, allergic conjunctivitis), Map-Dot-Fingerprint Dystrophy, acanthamoeba, fibromyalgia, Meibomian gland dysfunction, thyroid eye disease, rosacea, ptosis, keratoconus, ocular pain syndrome, Steven-Johnson's syndrome, corneal epitheliopathies, corneal neuropathies (including LASIK induced corneal neuropathies), corneal dystrophies (including recurrent corneal dystrophies), epithelial basement membrane dystrophy, corneal erosions or abrasions (including recurrent corneal erosions or abrasions), ocular surface diseases, blepharitis, graft vs host disease, meibomitis, glaucoma, conjunctivochalasis, keratopathis (including herpetic keratopathy, filamentary keratopathy, band or bullous keratopathy, exposure keratopathy), keratitis (including herpes simplex virus keratitis), iritis, episclentis, corneal surgery, multiple sclerosis, trichiasis, pterygium, neuralgia, xerophthalmia, patients recovering from neurotrophic keratitis, or ocular pain persisting for at least three months after photorefractive keratectomy (PRK) surgery or laser-assisted in situ keratomileusis (LASIK) surgery.

57 . The method according to claim 53 , wherein the administration results in a reduction in the subject's pain of at least about 10%, at least about 15%, at least about 20%, or at least about 25%, compared to a placebo, wherein the reduction in the pain score arises from the difference in pain scores prior to and after administration of compound I to the subject.

58 . The method according to claim 57 , wherein the reduction in pain score occurs within about half hour after administration of compound I to the subject.

59 . The method according to claim 53 , wherein the compound of formula I is administered for at least about one, at least about two, or at least about three months.

60 . The method according to claim 59 , wherein the compound of formula I is administered to the subject one to four times daily.

61 . The method according to claim 53 , wherein the subject suffers from dry eye disease, and the administration results in a decrease in the ocular pain associated with dry eye disease.

62 . The method according to claim 61 , wherein the administration results in reduced incidence of at least about 10% in one or more of ocular dryness, ocular discomfort, ocular hyperemia, ocular burning or stinging, grittiness or foreign body sensation, or photophobia.

63 . A method of reducing ocular hyperemia in a subject in need thereof, comprising ocularly administering 4 to the subject -(7-Hydroxy-2-isopropyl-4-oxo-4H-quinazolin-3-yl)-benzonitrile (Formula I) having structure:

or a salt, solvate, polymorph, or co-crystal thereof; wherein the compound of formula I is administered at a concentration of about 0.5% w/v to about 3.5% w/v, about 0.5% w/v to about 2.5% w/v, or about 0.5% w/v to about 1.5 w/v, about 0.5% to about 3.0% w/v, about 1.0% to about 2.5% w/v, about 1.5% to about 3.0% w/v, or about 0.5% to about 2.5% w/v.

64 . The method according to claim 63 , wherein the reduction in ocular hyperemia is at least about 1, at least about 2, at least about 3, at least about 4, or at least about 5, on the McMonnies scale.

65 . The method of claim 63 , comprising administering the compound of formula I at a total daily dose per eye of about 0.5 to about 3.5 mg, or about 0.5 mg, about 1.0 mg, about 1.5 mg, about 2.0 mg, about 2.5 mg, about 3.0 mg, or about 3.5 mg.

66 . The method of claim 63 , wherein the ocular hyperemia is associated with one or more of dry eye disease, Sjogren's Syndrome, conjunctivitis (including keratoconjuctivitis, vernal keratoconjunctivitis, allergic conjunctivitis), Map-Dot-Fingerprint Dystrophy, acanthamoeba, fibromyalgia, Meibomian gland dysfunction, thyroid eye disease, rosacea, ptosis, keratoconus, ocular pain syndrome, Steven-Johnson's syndrome, corneal epitheliopathies, corneal neuropathies (including LASIK induced corneal neuropathies), corneal dystrophies (including recurrent corneal dystrophies), epithelial basement membrane dystrophy, corneal erosions or abrasions (including recurrent corneal erosions or abrasions), ocular surface diseases, blepharitis, graft vs host disease, meibomitis, glaucoma, conjunctivochalasis, keratopathis (including herpetic keratopathy, filamentary keratopathy, band or bullous keratopathy, exposure keratopathy), keratitis (including herpes simplex virus keratitis), iritis, episclentis, corneal surgery, multiple sclerosis, trichiasis, pterygium, neuralgia, xerophthalmia, patients recovering from neurotrophic keratitis, or ocular pain persisting for at least three months after photorefractive keratectomy (PRK) surgery or laser-assisted in situ keratomileusis (LASIK) surgery.

67 . A method of reducing chronic ocular surface pain in a subject in need thereof, comprising ocularly administering an effective amount of 4-(7-Hydroxy-2-isopropyl-4-oxo-4H-quinazolin-3-yl)-benzonitrile (Formula I) having structure:

or a salt, solvate, polymorph, or co-crystal thereof to the subject.

68 . The method of claim 67 , comprising administering the compound of formula I in a formulation at a concentration of about 0.5% w/v, about 1.0% w/v, about 1.5% w/v, about 2.0% w/v, about 2.5% w/v, about 3.0% w/v, or about 3.5% w/v.

69 . The method of claim 67 , comprising administering the compound of formula I at a total daily dose per eye of about 0.5 to about 3.5 mg, or about 0.5 mg, about 1.0 mg, about 1.5 mg, about 2.0 mg, about 2.5 mg, about 3.0 mg, or about 3.5 mg.

70 . The method according to claim 67 , wherein the subject suffers from one or more of dry eye disease, Sjogren's Syndrome, conjunctivitis (including keratoconjuctivitis, vernal keratoconjunctivitis, allergic conjunctivitis), Map-Dot-Fingerprint Dystrophy, acanthamoeba, fibromyalgia, Meibomian gland dysfunction, thyroid eye disease, rosacea, ptosis, keratoconus, ocular pain syndrome, Steven-Johnson's syndrome, corneal epitheliopathies, corneal neuropathies (including LASIK induced corneal neuropathies), corneal dystrophies (including recurrent corneal dystrophies), epithelial basement membrane dystrophy, corneal erosions or abrasions (including recurrent corneal erosions or abrasions), ocular surface diseases, blepharitis, graft vs host disease, meibomitis, glaucoma, conjunctivochalasis, keratopathis (including herpetic keratopathy, filamentary keratopathy, band or bullous keratopathy, exposure keratopathy), keratitis (including herpes simplex virus keratitis), iritis, episclentis, corneal surgery, multiple sclerosis, trichiasis, pterygium, neuralgia, xerophthalmia, patients recovering from neurotrophic keratitis, or ocular pain persisting for at least three months after photorefractive keratectomy (PRK) surgery or laser-assisted in situ keratomileusis (LASIK) surgery.

71 . The method according to claim 67 , wherein the administration results in a reduction in the subject's pain of at least about 10%, at least about 15%, at least about 20%, or at least about 25%, compared to a placebo, wherein the reduction in the pain score arises from the difference in pain scores prior to and after administration of compound I to the subject.

72 . The method according to claim 71 , wherein the reduction in pain score occurs within about half hour after administration of compound I to the subject.