Table 1 Abnormal lid margin findings

Lid margin vascularity

 0 = No or slight redness of lid margin conjunctiva and no telangiectasia crossing meibomian gland orifices

 1 = Redness of lid margin conjunctiva and no telangiectasia crossing meibomian gland orifices

 2 = Redness of lid margin conjunctiva and telangiectasia crossing meibomian gland orifices with a distribution of less than half of the full length of the lid

 3 = Redness of lid margin conjunctiva and telangiectasia crossing meibomian gland orifices with a distribution of half or more of the full length of the lid

Plugging of meibomian gland orifices

 0 = No plugging of gland orifices

 1 = Plugging of fewer than three gland orifices

 2 = Plugging of three or more gland orifices with a distribution of less than half of the full length of the lid

 3 = Plugging of three or more gland orifices with a distribution of half or more of the full length of the lid

Lid margin irregularity

 0 = No lid margin irregularity

 1 = Fewer than three lid margin irregularities with shallow notching

 2 = Three or more lid margin irregularities with shallow notching or any irregularities with deep notching