NORC I 2016 VSP Summary Data Report for the vision& Eye Health Surveillance System Strabismus Amblyopia Injury, burns and surgical complications of the eye Surgical complication Disorders of optic nerve and visual pathway Optic nerve disorders Visual pathway disorders Other visual disturbances Visual field defect Color blindness Other/unspecified visual disturbances Infectious and inflammatory diseases Infectious diseases Conjunctivitis Eyelid infection and inflammation Other inflammatory conditions Lacrimal system and orbit inflammation Orbital and external disease Other/unspecified orbital or external disease Lacrimal diseases syndrome Disorders of the globe Cancer and neoplasms of the eye Malignant neoplasm of the eye Benign neoplasm of the eye Cornea disorders Keratoconus Endothelial dystrophy(inc Fuchs) Other comeal disorders Other eye disorders Denominators used to calculate Prevalence rates VSP requested that no patient counts or denominator information be publicly released. The patient denominators used to calculate rates include those patients who were enrolled in VSP at any time during the calendar year. VSP enrollment data is based primarily on employer-provided enrollment data, and may not accurately reflect the actual number of patients enrolled in vSP over the course of the year. In addition, some patient enrollment data is incomplete. In particular, state of residence is not always reported, with 8% of enrollees not having a state of residence on file. For the purposes of this analysis, we distributed patients with missing state in the denominators to a state based on the distribution of patients with known state location. We will continue to investigate possible approaches to improve state location coverage, and mitigate any potential bias of this limitationNORC | 2016 VSP Summary Data Report for the Vision & Eye Health Surveillance System 11 Strabismus Amblyopia Injury, burns and surgical complications of the eye Injury Burn Surgical complication Disorders of optic nerve and visual pathways Optic nerve disorders Visual pathway disorders Other visual disturbances Visual field defect Color blindness Night blindness Other/unspecified visual disturbances Infectious and Inflammatory diseases Infectious diseases Keratitis Conjunctivitis Eyelid infection and inflammation Other inflammatory conditions Lacrimal system and orbit inflammation Endophthalmitis Orbital and external disease Congenital anomalies Other/unspecified orbital or external disease Lacrimal diseases Eyelid disorders Dry eye syndrome Disorders of the globe Cancer and neoplasms of the eye Malignant neoplasm of the eye Benign neoplasm of the eye Cornea disorders Keratoconus Endothelial dystrophy (inc Fuchs) Other corneal disorders Other eye disorders Denominators used to Calculate Prevalence Rates VSP requested that no patient counts or denominator information be publicly released. The patient denominators used to calculate rates include those patients who were enrolled in VSP at any time during the calendar year. VSP enrollment data is based primarily on employer-provided enrollment data, and may not accurately reflect the actual number of patients enrolled in VSP over the course of the year. In addition, some patient enrollment data is incomplete. In particular, state of residence is not always reported, with 8% of enrollees not having a state of residence on file. For the purposes of this analysis, we distributed patients with missing state in the denominators to a state based on the distribution of patients with known state location. We will continue to investigate possible approaches to improve state location coverage, and mitigate any potential bias of this limitation