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.
This moon appears half-lit to us, and half moon is a beloved name (although not an official one). Still, itâs good to recall that the illuminated portion of a first quarter moon truly is just a quarter. On the night of first quarter moon, we see half the moonâs day side, or a true quarter of the moon. Another lighted quarter of the moon shines just as brightly in the direction opposite Earth! A first quarter moon rises at noon and is high overhead at sunset. It sets around midnight. First quarter moon comes a week after new moon. Now, as seen from above, the moon in its orbit around Earth is at right angles to a line between the Earth and sun. As the moon orbits Earth, it changes phase in an orderly way. Follow these links to understand the various phases of the moon.