Attól függően, hogy van-e asztigmia, másik próbalencsét választunk.

It is a common Hungarian way to say depending on whether... or more generally depending on....

In this sentence, Attól függően, hogy van-e asztigmia... means:

depending on whether there is astigmatism...

So this opening part sets up the condition or factor that the decision depends on.

Attól comes from az meaning that, plus the ending -tól/-től, which often means from.

So literally, attól függően is something like depending on that.

You do not need to translate it word for word every time, though. In practice, attól függően works as part of a fixed expression meaning depending on.

Also, the form is attól, not aztól, because of sound changes in Hungarian spelling and pronunciation.

Függően comes from the verb függ, meaning to depend or to hang.

Here it is a participial form, and in modern Hungarian it is most often seen in the fixed expression attól függően.

So even though it comes from a verb, many learners are best off understanding attól függően as a single unit meaning depending on rather than trying to build it from scratch every time.

Hogy introduces a subordinate clause.

After attól függően, Hungarian often uses hogy when what follows is a full clause rather than just a noun.

So:

• Attól függően, hogy van-e asztigmia... = Depending on whether there is astigmatism...

Without hogy, the structure would feel incomplete here.

The -e is a question particle used in Hungarian yes-no questions and embedded whether clauses.

So:

• van = is / there is
• van-e = is there? / whether there is

In standard spelling, -e is attached to the verb with a hyphen, so van-e is correct.

In this sentence, it does not make the whole sentence a direct question. Instead, it creates an embedded whether meaning:

whether there is astigmatism

Because -e attaches to the finite verb, not to the noun.

So the normal form is:

• van-e asztigmia

not:

• van asztigmia-e

That second version is not standard Hungarian.

A good rule for learners is: in this kind of structure, attach -e to the verb.

Hungarian often leaves out the article in this kind of existential or diagnostic wording.

So van asztigmia is literally there is astigmatism, and in context it can also mean the patient has astigmatism.

This is natural Hungarian.

If you wanted a more explicitly possessive version, Hungarian could also say something like asztigmiája van, meaning he/she has astigmatism. But the sentence you have uses a more impersonal, clinical style.

Because it is the direct object of the verb választunk meaning we choose.

Hungarian marks direct objects with the accusative ending -t.

So:

• próbalencse = trial lens
• próbalencsét = trial lens as a direct object

Also, nouns ending in -a or -e often lengthen that final vowel before certain endings:

• próbalencse → próbalencsét

This is a very common pattern in Hungarian.

Másik can mean another or a different and can appear without an article.

So:

• másik próbalencsét = another / a different trial lens

This keeps the object indefinite.

If you said:

• a másik próbalencsét, that would mean the other trial lens, a specific one
• egy másik próbalencsét is also possible, but often unnecessary

So the version in your sentence is completely natural.

This is because Hungarian has two main verb conjugation patterns:

• indefinite conjugation
• definite conjugation

Here the object is indefinite:

• másik próbalencsét = another / a different trial lens

So Hungarian uses the indefinite form:

• választunk = we choose

If the object were definite, Hungarian would use the definite conjugation:

• a másik próbalencsét választjuk = we choose the other trial lens

This is a very important grammar point in Hungarian.

Hungarian word order is much freer than English word order.

English strongly prefers:

• we choose a different trial lens

Hungarian can place the object before the verb quite naturally:

• másik próbalencsét választunk

This is especially common with indefinite objects and in neutral, matter-of-fact statements.

So you should not assume that Hungarian always follows English-style subject + verb + object order. Word order in Hungarian is influenced a lot by information structure, emphasis, and sentence rhythm.

Választunk is:

• present tense
• first person plural

So literally it means we choose.

In medical or professional language, Hungarian often uses we in a practical, institutional, or professional sense, just like English sometimes does. It does not necessarily mean that several people are physically doing the action together.