Author Topic: why only use a plus for less than -2.00  (Read 938 times)

Offline rtdfgdfgdfgdfg

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why only use a plus for less than -2.00
« on: August 09, 2015, 01:10:40 PM »
https://www.youtube.com/watch?v=x5Efg42-Qn0

20:18

only use a plus if you are -2.00 or less

but what if someone with -5 in each eye used a plus ?

surely he will get benefits too ?

Offline HansK

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Re: why only use a plus for less than -2.00
« Reply #1 on: August 09, 2015, 04:15:25 PM »
Hi,

no, he will not benefit. -5 diopters means you can not see CLEARLY further than 1/5 = 20 cm = 8 inches.

Do you read that close? You should not.

The idea is to simulate viewing in the distance and to have a clear image with a bit of blur to challenge your eyes.

Kind regards,
Hans

Offline rtdfgdfgdfgdfg

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Re: why only use a plus for less than -2.00
« Reply #2 on: August 10, 2015, 11:20:12 AM »
yes,

and you can create blur at that range , even though it would look silly to a passer by