Comments

1. S C Said,

   binocular, multiple lenses, and high res

   I’m not positive, but pretty sure

2. Biofan Said,

   binocular construction (2 eyes are better than 1)
   multiple objective lenses (to allow you to zoom in on specific detail of organelles or even fluorescent molecules)
   high resolution (a high resolution, compared with a low, allows you to distinguish two points that are very close together…see this)