Why Is BVD Important?

Why Is BVD Important? Vertex distance, sometimes referred to as back vertex distance or BVD, is an important, often critical part of ophthalmic optics. … With the rapid adoption of pseudo phakia (IOLs) came an equal drop in the interest in taking vertex distance calculations or making the necessary adjustments in power. What does vertex

How Many Ways Can The Vertices Of An Equilateral Triangle Be Colored Using Three Different Colors?

How Many Ways Can The Vertices Of An Equilateral Triangle Be Colored Using Three Different Colors? So, there are k=10 distinct orbits of X under G, which means there are 10 distinct colorings of the vertices of the equilateral triangle with 3 colors. How many distinct ways can the vertices of an equilateral triangle be