Mam dobry wzrok.

Because in Polish, having good eyesight is normally expressed with mieć (to have), just like in English:

• Mam dobry wzrok. = I have good eyesight.

Using jestem would not work here. Polish treats wzrok (eyesight/vision) as something you have, not something you are.

Wzrok means eyesight, vision, or sense of sight.

It does not mean eye.
For eye, Polish uses oko.

So:

• Mam dobry wzrok. = I have good eyesight.
• Not: I have a good eye in the literal body-part sense.

Depending on context, English might translate it as:

• I have good eyesight
• My vision is good

Because after mam (I have), the noun is normally the direct object, so it goes into the accusative case.

Here is the key point:

• wzrok is a masculine inanimate noun
• In the singular accusative, masculine inanimate nouns usually look the same as the nominative

So:

• nominative: dobry wzrok
• accusative: dobry wzrok

They look identical here.

If it were a different noun type, the form might change more obviously.

It is in the accusative singular.

Why?

• mam = I have
• The thing you have is the direct object
• Direct objects usually take the accusative

So in Mam dobry wzrok:

• mam = verb
• dobry wzrok = accusative object

Even though wzrok looks the same as the dictionary form, grammatically it is functioning as the accusative.

Because adjectives in Polish must agree with the noun in:

• gender
• number
• case

Here, wzrok is:

• masculine
• singular
• accusative (with masculine inanimate looking like nominative)

So the adjective must match:

• dobry wzrok

If the noun were feminine, neuter, plural, or in another case, the adjective form would change too.

Yes, it is natural and correct.

It is a normal way to say that your eyesight is good.

Other common patterns are:

• Mam słaby wzrok. = I have poor eyesight.
• Mam bardzo dobry wzrok. = I have very good eyesight.
• Mam świetny wzrok. = I have excellent eyesight.

So the sentence sounds perfectly normal.

Yes. That is also correct:

• Mój wzrok jest dobry. = My eyesight is good.

But it is a little more explicit and slightly less simple than Mam dobry wzrok.

In everyday speech, Mam dobry wzrok is very common and natural.

So both work, but:

• Mam dobry wzrok = more direct, very natural
• Mój wzrok jest dobry = also correct, a bit more descriptive

Grammatically, it is possible, but in normal conversation it sounds odd.

Why? Because everyone has eyesight in some sense, so Mam wzrok (I have eyesight) usually does not communicate much by itself.

Polish speakers normally add some description, for example:

• Mam dobry wzrok. = I have good eyesight.
• Mam słaby wzrok. = I have poor eyesight.
• Mam kiepski wzrok. = I have bad eyesight.

So in most real situations, you would keep the adjective.

A rough pronunciation guide is:

• Mam → mahm
• dobry → DOH-bri
• wzrok → VZROK

A few useful sound notes:

• w in Polish sounds like English v
• rz usually sounds like the s in measure, but here the word is wzrok, where the cluster is pronounced with a clear z + r sequence
• y in dobry is not exactly English ee; it is a distinct Polish vowel

A simple approximation:

mahm DOH-bri VZROK

The neutral word order is:

• Mam dobry wzrok.

That is the most standard way to say it.

You can change word order in Polish for emphasis, but not all versions sound equally natural. For example:

• Dobry wzrok mam. — possible, but marked/emphatic
• Wzrok mam dobry. — also possible with emphasis/contrast

For a learner, the safest and most natural choice is:

• Mam dobry wzrok.

No. Polish has no articles like a, an, or the.

So Mam dobry wzrok naturally contains no word corresponding to an article.

In English, you usually say:

• I have good eyesight

Notice that English normally does not use a here either. So the Polish sentence matches English pretty neatly in that respect.

Sometimes wzrok can appear in broader expressions connected with seeing, but in a sentence like Mam dobry wzrok, it clearly means physical eyesight.

If you wanted to talk about vision in the abstract sense, like a vision for the future, Polish would usually use different wording, depending on context.

So for this sentence, think of wzrok as:

• eyesight
• visual ability
• sense of sight

Here are some very common ones:

• Mam słaby wzrok. = I have poor eyesight.
• Mam bardzo dobry wzrok. = I have very good eyesight.
• Mam świetny wzrok. = I have excellent eyesight.
• Mam coraz słabszy wzrok. = My eyesight is getting worse.
• Mam problem ze wzrokiem. = I have a problem with my eyesight.

These are useful because they keep the same basic pattern:

• Mam + adjective/noun phrase + wzrok

or a closely related structure.