Die optometris bespreek bysiendheid en versiendheid.

Yes. Die is the Afrikaans definite article, so here it means the.

A useful thing to know is that Afrikaans does not have grammatical gender like German or Dutch, so die can be used regardless of whether the noun is masculine, feminine, or neuter. In beginner terms, you can often think of die simply as the.

In this sentence:

• Die optometris = the optometrist

Optometris is the Afrikaans word for optometrist. It is a borrowed/cognate word, but Afrikaans spelling sometimes differs slightly from English.

So:

• optometrist → English
• optometris → Afrikaans

Afrikaans nouns also do not change for grammatical gender, so optometris can refer to a male or female optometrist unless the context makes it clear.

In Afrikaans, verbs are much simpler than in English. In the present tense, the verb usually does not change form depending on the subject.

So you get:

• Ek bespreek = I discuss
• Jy bespreek = you discuss
• Die optometris bespreek = the optometrist discusses

That means bespreek stays the same.

This is one of the nice things about Afrikaans grammar: there is much less verb conjugation than in English.

Yes, in this sentence it is very similar to English.

The pattern is:

• Die optometris = subject
• bespreek = verb
• bysiendheid en versiendheid = object

So it follows a normal main-clause order:

Subject + Verb + Object

That makes this sentence quite straightforward for an English speaker.

They are built from smaller parts:

• by = near
• siend = seeing
• -heid = -ness

So bysiendheid literally means something like near-seeing-ness, which corresponds to short-sightedness / nearsightedness.

And:

• ver = far
• siend = seeing
• -heid = -ness

So versiendheid literally means far-seeing-ness, which corresponds to farsightedness / long-sightedness.

This is a very common Afrikaans pattern:
adjective or descriptive base + -heid to make an abstract noun.

The suffix -heid usually turns a quality or state into an abstract noun, much like English -ness.

Examples:

• moontlik = possible → moontlikheid = possibility
• eerlik = honest → eerlikheid = honesty
• bysiend = near-sighted → bysiendheid = near-sightedness

So in your sentence, -heid is what turns the descriptive words into the names of the conditions.

Because they are being used as general abstract nouns, like English short-sightedness and farsightedness in a general sense.

English also often leaves out the article in this kind of sentence:

• The optometrist discusses short-sightedness and far-sightedness.

Afrikaans does the same here:

• Die optometris bespreek bysiendheid en versiendheid.

If you were talking about a specific case already known from context, you might sometimes use die, but in a general statement it is natural to leave it out.

Yes. En is the normal Afrikaans word for and.

So:

• bysiendheid en versiendheid = short-sightedness and far-sightedness

Be careful not to confuse en with ’n, which means a/an.

For example:

• en = and
• ’n optometris = an optometrist

No. Unlike German, Afrikaans does not capitalize all nouns.

So in this sentence:

• optometris
• bysiendheid
• versiendheid

are all lowercase, because they are common nouns, not proper names.

Only the first word of the sentence is capitalized here because it begins the sentence:

• Die

A rough guide for an English speaker is:

bespreek ≈ buh-SPRAYK

A few notes:

• The stress is usually on the second syllable: be-SPREEK
• The ee sound is a long vowel
• The final k is clearly pronounced

It is related in meaning to English discuss, and in form it resembles Dutch/German-style vocabulary.

A very common past-tense form in Afrikaans uses het + past participle.

So:

• Die optometris bespreek bysiendheid en versiendheid.
  = The optometrist discusses short-sightedness and far-sightedness.

becomes:

• Die optometris het bysiendheid en versiendheid bespreek.
  = The optometrist discussed short-sightedness and far-sightedness.

Notice that in the past tense, the main verb moves to the end in this kind of clause:

• het ... bespreek

Yes—this sentence shows several core Afrikaans patterns that are helpful early on:

1. Simple article

   • Die = the

2. Little verb conjugation

   • bespreek stays the same

3. Straightforward main-clause word order

   • Subject + Verb + Object

4. Useful compound-building

   • bysiendheid
   • versiendheid

5. Abstract noun suffix

   • -heid = -ness

So even though the medical vocabulary is advanced, the grammar of the sentence is actually quite learner-friendly.