Optyk dobierze soczewki.

Dobierze comes from dobrać and means more than just choose. It usually means select so that something fits or suits someone.

So in this sentence, the idea is that the optician will select the right lenses, not merely pick some lenses at random.

Because dobierze is a form of the perfective verb dobrać.

In Polish, perfective verbs do not normally have a true present tense. Their present-looking forms usually refer to a completed action in the future.

So:

• dobrać = perfective = to select successfully / to match
• dobierze = he/she will select / will fit

Compare:

• dobiera = imperfective = is selecting, selects regularly
• dobierze = perfective = will select once, as a completed action

The infinitive is dobrać.

This is a common pattern in Polish: the finite form does not always look very close to the infinitive.

Here is the pair:

• dobierać — imperfective
• dobrać — perfective

And the sentence uses the perfective form dobierze.

Polish does not have articles like English the and a/an.

So optyk can mean:

• an optician
• the optician

and soczewki can mean:

• lenses
• the lenses

Context tells you which one is meant.

Because Polish usually drops subject pronouns when they are not needed.

The verb form dobierze already tells you it is third person singular: he/she/it will select. Since optyk is present, there is no need to add on for he.

Polish only uses the pronoun more often when it is needed for emphasis or contrast.

Optyk is the subject, so it is in the nominative case.

Soczewki is the direct object, so it is in the accusative case.

However, for many feminine plural nouns, the accusative plural looks the same as the nominative plural. That is what happens here.

So:

• optyk = nominative singular
• soczewki = accusative plural, but it looks the same as nominative plural

You understand the role from the sentence structure and meaning.

Yes. Soczewki is a general word for lenses.

Depending on context, it can mean:

• lenses for glasses
• contact lenses

If you want to be specific about contact lenses, Polish often says soczewki kontaktowe.

In a sentence with an optician, both interpretations are possible unless the wider context makes it clear.

Yes. Polish word order is more flexible than English.

The neutral order here is:

• Optyk dobierze soczewki.

But you could also hear:

• Soczewki dobierze optyk.
• Dobierze soczewki optyk.

These alternatives change the focus or emphasis, not the basic meaning. The original version is the most straightforward and neutral.

Not exactly.

Optyk is usually closest to optician in English. It refers to someone connected with selecting, making, or supplying glasses or lenses.

If you specifically mean optometrist, Polish often uses optometrysta.

So in this sentence, optyk is best understood as optician.

A rough English-friendly pronunciation is:

OP-tik do-BYE-zhe so-CHEF-kee

A few useful details:

• y in optyk is a Polish vowel with no exact English equivalent
• rz in dobierze sounds like zh in measure
• cz in soczewki sounds like ch, but harder and retroflex
• w in soczewki is pronounced like English v, but here it becomes devoiced before k, so it sounds closer to f

Stress is normally on the second-to-last syllable:

• OP-tyk
• do-BIE-rze
• so-CZEW-ki

Yes, but it changes the meaning.

• Optyk dobierze soczewki = The optician will select the lenses
  A future, completed action.

• Optyk dobiera soczewki = The optician is selecting the lenses or selects lenses
  A present or habitual action.

So if you mean a single future result, dobierze is the better form.