The unique optomap ultra-widefield view helps your eye care practitioner detect early signs of retinal disease more effectively and efficiently than with traditional eye exams. Early detection means successful treatments can be administered and reduces the risk to your sight and health.
An electron dot diagram is a method of writing the chemical symbol of an element by surrounding it with dots to indicate the number of valence electrons. Valence electrons are found in an atom's outer shell and are the ones involved in chemical reactions.
Square symbols. Box signs are symbols which are usually used to make pseudographics. All people who has a bit more experience of using computer should have seen them on all that old DOS programs simulating graphic interface. Some of them are also used by me in my text generators.