Making My Own Glasses
&gt; As a doctor I know some things about the human eye so I understand how to use those lenses. However, I have no clue about the magic ritual of the optician (“Do you see better with this lens?” - selects random lens and holds it in front of my eye).<p>&gt;Luckily, I didn’t have to.<p>There&#x27;s a specific reason why they do this and ask you to make a decision in an instant. It&#x27;s called accommodation.  Your eyes will quickly try and accommodate and find focus if they&#x27;re allowed to stare too long. This could explain the reason he got such different results from the exams. He was trying too hard. Just follow directions.<p>Edit:<p>&gt; One more thing. Do you remember the process in which an optician makes you wear a new pair of glasses and stares at you with this optician-look, takes the pair of glasses away from you again, goes to the back office and starts bending parts of it in a seemingly random manner, comes back, hands you the pair of glasses which now suddenly fit perfectly?<p>&gt; Yeah, I attempted to do that with my new pair of glasses and noticed that I suck at it. I would bend it to look similar like the glasses from the optician only to realize that the back of my ears were hurting after a few hours of wear.<p>Is he really a Doctor???  He doesn&#x27;t know there&#x27;s a Mastoid bone there that the &quot;bending&quot; (aka: Adjusting) the optician is doing is to AVOID putting pressure on that bone!?