The scientific definition of hardness is the ability to resist scratching, nothing more. If you ask most folks, theyâll say feathers are soft and glass is hard. In the world of gemology, however, glass is fairly soft. It can be scratched easily by a variety of what we gemologists consider hard substances.
convergence excess. Convergence excess is an over-convergence of the eyes at a near distance for extended periods of time, such as when reading, writing, drawing, or viewing a computer screen. Sometimes, the over-convergence can result in diplopia (double vision).nce a diagnosis of convergence insufficiency has been made, a simple visual therapy technique that may be helpful is pencil pushups. 1. Hold a pencil at arm s length, with the eraser about level with the tip of your nose.
Best Answer: An excess is a payment you have to make if you decide to claim on your policy. If you claim on your policy your insurance company will be paying you out, so basically it's a way of them paying a little less and keeping their costs down.eport Abuse. Excess is the amount payable in the event of an accident. If you have a vehicle insured for $10,000 and you have an at fault accident your excess might be $300 depending on the terms of your policy.