Presbyopia 1: Why Do We Need Reading Glasses?

[@gth042]

Thank you for this! Thank you also for sharing references. I learn best from source-chasing. It is a shame so much OCT data is discarded -- a lot of points to fill in.

[@assimil8or]

Great video. Very informative 👏

[@Gabriell...R]

Você é um professor excelente! You're a great professor!

[@mleii1169]

I have a question that I'm wondering if you might know the answer to. With regards to astigmatism, what might cause the distance to the test to change which direction the lines are blurry and clear? Close up the horizontal lines are more clear and the vertical most fuzzy, but when at a distance that is not say reading distance to perhaps a monitor and further away it's the opposite. So when further away the horizontal lines are now fuzzy yet the vertical lines are now clear. If it were the shape of my eye lens or cornea wouldn't they be the same or similar direction no matter the distance?