Document ID: chunk:federal_register_of_legislation:F2015L01671:reg:9
Version: federal_register_of_legislation:F2015L01671
Segment Type: reg
Provision Reference: reg 9
Character Range: 3715–5044

9               Factors that must exist
At least one of the following factors must as a minimum exist before it can be said that a reasonable hypothesis has been raised connecting pterygium or death from pterygium with the circumstances of a person's relevant service:
(1)          having sunlight exposure to the unprotected eye for at least 2 250 hours while in a tropical area, or having equivalent sunlight exposure in other latitude zones, before the clinical onset of pterygium;
Note: equivalent sunlight exposure in other latitude zones, tropical area and unprotected eye are defined in the Schedule 1 – Dictionary.
(2)          having heavy exposure of the affected eye to dust, for an average of at least 20 hours per week, for at least the two years before the clinical onset of pterygium;
Note: heavy exposure of the affected eye to dust is defined in the Schedule 1 – Dictionary.
(3)           having exposure of the affected eye to arc welding light, while welding without eye protection, for an average of at least 20 hours per week, for at least the two years before the clinical onset of pterygium;
(4)           having human papilloma virus type 16 or 18 infection of the conjunctiva at the time of the clinical onset of pterygium;
(5)          inability to obtain appropriate clinical management for pterygium.