סנוור מוביל למאמץ עיניים, אבל לא לראייה כפולה.

מוביל ל־ literally means leads to. In Hebrew, it is often used for cause-and-result relationships, especially in slightly formal or explanatory language.

So in this sentence:

• סנוור מוביל למאמץ עיניים = glare leads to eye strain
• אבל לא לראייה כפולה = but not to double vision

A close alternative would be גורם ל־ (causes), but מוביל ל־ sounds a bit more like results in / leads to.

Because the verb pattern is להוביל ל־ = to lead to.

That means the thing that follows normally takes ל־:

• מוביל למאמץ
• מוביל לראייה

After אבל, the verb is omitted because it is already understood, but the preposition stays:

• אבל לא לראייה כפולה = but not [leading] to double vision

So the second half is really a shortened version of:

• אבל לא מוביל לראייה כפולה

Hebrew often leaves out repeated words when they are easy to understand from context.

So:

• סנוור מוביל למאמץ עיניים, אבל לא לראייה כפולה

means the same as the fuller version:

• סנוור מוביל למאמץ עיניים, אבל לא מוביל לראייה כפולה

This kind of omission is very natural and common.

It is a noun phrase meaning eye strain.

The first word, מאמץ, means strain or effort.
The second word, עיניים, means eyes.

Together, מאמץ עיניים functions like a fixed expression: eye strain.

You can think of it as similar to a construct-type relationship in Hebrew, where two nouns are linked and the second noun helps specify the first:

• מאמץ עיניים = strain of the eyes / eye strain

English often uses noun + noun compounds, while Hebrew often uses this kind of noun relationship instead.

עיניים is a dual form, not just an ordinary plural.

Hebrew often uses the dual ending ־ַיִם / ־ַיִם for body parts that naturally come in pairs, such as:

• עיניים = eyes
• אוזניים = ears
• ידיים = hands
• רגליים = legs

So even though English just says eyes, Hebrew uses this special paired form.

Because in Hebrew, adjectives usually come after the noun they describe.

So:

• ראייה כפולה = double vision
• literally: vision double

This is the normal Hebrew order:

• ספר טוב = a good book
• מכונית מהירה = a fast car
• ראייה כפולה = double vision

Because it agrees with ראייה, and ראייה is a feminine noun.

In Hebrew, adjectives must match the noun in gender and number.

So:

• ראייה = feminine singular
• therefore כפולה = feminine singular

If the noun were masculine singular, you would expect כפול instead.

ראייה is the standard modern spelling of the noun meaning vision / seeing / eyesight.

The extra י helps represent the -iya sound in the word:

• ראייה ≈ re'iyah / ri'iyah

In unpointed Hebrew, these fuller spellings are common because they make pronunciation clearer. This spelling also helps distinguish the word from other similar-looking forms in some contexts.

Because the sentence is making a general statement, not talking about one specific instance.

So:

• סנוור = glare, glare in general
• מאמץ עיניים = eye strain, in general
• ראייה כפולה = double vision, in general

If you added ה־, it would sound more specific:

• הסנוור = the glare
• הראייה הכפולה = the double vision

But here the sentence is more like a general fact, so the nouns stay indefinite.

Here, סנוור is a noun. It means glare or dazzling light.

You can tell it is the subject because the verb comes after it:

• סנוור מוביל... = Glare leads...

There is also a related verb:

• לסנוור = to dazzle / to blind with glare

So the words are related, but in this sentence סנוור is the noun.

Yes. סנוור גורם למאמץ עיניים, אבל לא לראייה כפולה would also be natural.

The difference is small:

• גורם ל־ = causes
• מוביל ל־ = leads to / results in

גורם ל־ can sound a bit more direct.
מוביל ל־ can sound a bit more explanatory or process-oriented.

Both work in this kind of sentence.

A reasonable pronunciation guide is:

sinvúr מוביל lema'amáts eináyim, avál lo lir'iyá kfulá

A smoother full transliteration in Latin letters:

sinvur מוביל lema'amats einayim, aval lo lir'iya kfula

A few notes:

• מוביל = mo-VIL
• עיניים = ei-NA-yim
• ראייה = ri-i-YA or re-i-YA, depending on accent and style
• כפולה = kfu-LA

Transliterations vary, but this should help you say it naturally.