メガネをかけると賢そうに見えるねって英語でなんて言うの？

You can use the word, "intellectual" to describe a person who is intelligent and well-educated. Also, simply saying, "smart" in English can mean that the person is intelligent in modern language. Furthermore, "studious" can mean someone who works hard at their studies. Any of these three descriptions will work.

The two sentences you see provided above are excellent ways to express to your listener that they look smarter when they have glasses on. In the first sentence you will see the word intelligent and in the second sentence you will see the word sharp. Both of these words mean smart. Both of these words are appropriate for both formal and informal settings.

An "intellectual" is someone who is very intelligent or smart. By using this phrase, you can tell them that they look more intelligent with glasses. I hope that this helps :)

Native speakers will say like this: “You look smarter with those glasses on”.
There are lots of other ways to say it, but this one is the most accurate and most commonly used.
Here is an example on how to use this in a conversation:
A: You look smarter with those glasses on!
B: Oh my, thank you!

make (verb) - cause
"Smelling that food is making me hungry."

smarter (adjective) - more clever, more intelligent
"She is much smarter than she looks."

You can also say:
"Those glasses make you look more intelligent."
"You look more intelligent when you put on glasses."

A) You look intelligent with your glasses on.
*Intelligent - really smart, clever
eg : Amy is a very intelligent girl.

B) Wow! You look very smart with your glasses on.

C)Wearing those glasses makes you look like a real genius
*Genius -exceptional intellectual or creative power or other natural ability.
"she was a teacher of genius"

I hope this helps :-)

If you want to say to someone that they look smarter when they put on glasses, you can say:
"You look smarter with your glasses."
"Your glasses make you look smarter."
"You look smarter when you put on glasses."

If someone looks more clever or intelligent then they are said to look 'smarter'
When you put a pair of glasses on to help you read/see you are said to 'wear' them

In English intellectual is a formal way of saying smart. Smart is a more colloquial word, used in everyday conversation. Sharp means that you are intelligent and witty.

When someone looks smarter when they put on glasses.you want to tell them that they look smarter when they put on glasses. The above suggestions may be appropriate for thats scenario.

To tell a person that they look more intelligent when wearing glasses, you can say "Those glasses make you look smart."