Ayon sa sertipikong medikal, kumpleto ang pagsusuri sa mata.

Ayon sa is a fixed expression meaning according to, based on, or in accordance with. It introduces the source of the information.

So Ayon sa sertipikong medikal means According to the medical certificate.

A useful comparison:

• ayon sa ulat = according to the report
• ayon kay Ana = according to Ana

With a personal name, Filipino often uses kay instead of sa.

Because Filipino normally uses a linker between words that are closely connected.

Here, medikal describes sertipiko, so a linker is needed. Since sertipiko ends in a vowel, the linker appears as -ng attached to the first word:

• sertipiko + -ng + medikal → sertipikong medikal

Without the linker, sertipiko medikal sounds incomplete or unnatural.

Yes. Medikal na sertipiko is also understandable and natural, and it means the same thing: medical certificate.

The sentence you were given uses sertipikong medikal, but you may encounter both patterns in Filipino.

Because that part is an introductory phrase. The comma separates the source phrase from the main statement.

So the structure is:

• Ayon sa sertipikong medikal, = introductory source phrase
• kumpleto ang pagsusuri sa mata. = main statement

In casual writing, people sometimes leave commas out, but using one here is standard and clear.

Filipino often uses predicate-first word order. So:

• Kumpleto ang pagsusuri sa mata.

literally looks like Complete the eye examination, but it actually means The eye examination is complete.

Also, Filipino often does not use a separate present-tense word for is in this kind of sentence.

You can also say:

• Ang pagsusuri sa mata ay kumpleto.

This version is more inverted or formal. Here, ay is not exactly the same as English is. It mainly marks that the sentence has been rearranged.

Ang marks the topic or subject-like part of the sentence.

In this sentence, ang pagsusuri sa mata is the thing being described as kumpleto.

It often lines up with English the, so here it can be understood as:

• ang pagsusuri sa mata ≈ the eye examination

But ang is not just a simple article like English the. Its role is grammatical as well.

Pagsusuri means examination, inspection, evaluation, or analysis, depending on context. In this sentence, it means examination/checkup.

It comes from the root suri, which means to examine, to inspect, or to analyze.

So:

• suri = examine / inspect
• pagsusuri = examination / the act of examining

In a medical context, pagsusuri sa mata is a very natural way to say eye examination or examination of the eyes.

Here, sa helps mark the body part or area being examined. It gives the sense that the examination is focused on the eyes.

You may sometimes see ng in similar expressions, but sa mata fits this medical meaning very well.

Because the sentence is making a full statement, not just naming a type of examination.

Compare these:

• kumpleto ang pagsusuri sa mata = the eye examination is complete
• kumpletong pagsusuri sa mata = a complete eye examination

In the actual sentence, kumpleto is the predicate describing ang pagsusuri sa mata. If you change it to kumpletong, it becomes a modifier inside a noun phrase instead.

It can be understood either way from context. Filipino nouns often do not have to mark singular and plural as strictly as English does.

In this sentence, sa mata naturally refers to the eye area or eyes in a general sense. If someone wanted to make the plural explicit, they could say sa mga mata, but that is not necessary here.

No. Kumpleto only says that the examination is complete, full, or all required parts were done or included.

It does not tell you whether the findings were normal, healthy, or good.

So this sentence is about the completeness of the examination, not the medical result.

Adding na gives the sense of already or now.

Compare:

• Kumpleto ang pagsusuri sa mata. = The eye examination is complete.
• Kumpleto na ang pagsusuri sa mata. = The eye examination is already complete / is now complete.

So na adds a sense that the state has now been reached.