The BVD stands for Back Vertex Distance, this is a measurement that is included on any prescription where the sphere or cylinder powers are higher than + or - 5.00D and to a lesser extent some prescriptions where it is less than this power.
Winged Drone | Alate | Male Ant. Drones are the only male ants in a colony. They are born from un-fertilized eggs. Drones are not like typical ants. They donât do any work in their nests, and they look more like wasps than ants. They are reproductive winged ants and so are alates.
Ghost ants are members of a tiny invasive species that derives its name from the milky white, almost translucent, color of the ant's legs and abdomens. The color makes them difficult to see.aits are Better. Since ghost ants form several nests, the use of bait tends to be more effective in eradication than insecticide sprays which can kill the ant before it can return to its nest and poison the others. Ghost ants favor sweets so baits with a sugar or honey base work best.