Blepharitis, or eyelid inflammation, one of the most common problems, is characterized by erythematous eyelids with accumulation of debris along the eyelid margin. Malignant eyelid tumors may be associated with lash loss and erosion of normal eyelid structures.
Moon phases depend on the position of both the Sun and Moon with respect to the Earth. The 4 primary phases of the Moon are: new, first quarter, full and third quarter.
The first quarter (waxing half moon) will have the shape of a lowercase N when it rises and a lowercase U when it sets. The last quarter (waning half moon) will look like a lowercase U when it rises and a lowercase N when it sets. Both the waxing and waning crescent moon phases will look like a smile.