La óptica abre hoy.

Here óptica most naturally means an optician’s shop / glasses store / optical store, especially in everyday Spanish in Spain.

So La óptica abre hoy is likely talking about a business, not the science of optics.

A few possibilities for óptica:

• optics as a field of science
• optician’s / optical shop
• sometimes more broadly anything related to vision or lenses, depending on context

In this sentence, because it says abre hoy (“opens today” / “is open today”), the shop meaning is the one that fits best.

Spanish often uses the definite article much more than English does.

Here la óptica means:

• the optician’s
• the optical store
• the optician’s shop

The article la is there because óptica is being used as a noun, and nouns in Spanish usually take an article when you are talking about a specific place or business.

Compare:

• La farmacia abre hoy. = The pharmacy is open today.
• La panadería abre hoy. = The bakery is open today.

Yes. In this sentence, óptica is a feminine singular noun, so it takes la.

That gives:

• la óptica
• la farmacia
• la clínica

Even though in English we might think of the business as the optician’s, Spanish uses the noun óptica, which is feminine.

Abre is the:

• 3rd person singular
• present indicative of the verb abrir (to open)

Conjugation of abrir in the present:

• yo abro
• tú abres
• él / ella / usted abre
• nosotros abrimos
• vosotros abrís
• ellos / ellas / ustedes abren

Since la óptica is singular, the verb is abre.

Because Spanish usually does not need subject pronouns when the subject is already clear.

Here the subject is explicitly stated:

• La óptica = the optical shop

So adding ella would be unnecessary:

• La óptica abre hoy. = normal
• Ella abre hoy. = possible in another context, but now ella would mean she, not the shop

Spanish often leaves out pronouns because the verb ending already helps identify the subject.

It can mean either, depending on context.

Most likely meanings:

• The optician’s is open today.
• The optical store opens today.

Why both are possible:

• In Spanish, abrir can refer to a business opening for customers
• In practical everyday contexts, abre hoy often works like it’s open today

Context decides:

• If the shop has been closed on Sundays and today is different, abre hoy = it’s open today
• If it is opening for the first time, abre hoy = it opens today / opens today for the first time

It is very close, but not exactly the same.

• La óptica abre hoy
  Focuses on the action or schedule of opening; often sounds like a business-hours statement.

• La óptica está abierta hoy
  Focuses on the state: it is open today.

In many real situations, both would be understood similarly.

A rough distinction:

• abre hoy = opens / is open today
• está abierta hoy = is open today

If you are talking about opening hours or whether a place opens on a certain day, abre hoy is very natural.

Yes, hoy can move around.

All of these are possible:

• La óptica abre hoy.
• Hoy abre la óptica.
• La óptica hoy abre. → less natural in most ordinary contexts

The most neutral version here is:

• La óptica abre hoy.

If you put hoy first:

• Hoy abre la óptica. you are emphasizing today a bit more.

Yes. Spanish, like English, often uses the present tense for scheduled or near-future events.

So abre hoy can mean:

• opens today even though the opening may happen later in the day

This is very common with schedules, timetables, business hours, and planned events.

Examples:

• El museo abre mañana. = The museum opens tomorrow.
• La tienda cierra a las ocho. = The shop closes at eight.

The accent mark shows where the stress goes:

• ÓP-ti-ca

Without getting too technical, Spanish spelling rules require the written accent here because the stress falls on the third-to-last syllable.

So the accent helps you pronounce it correctly:

• óptica → stress on ÓP

It is pronounced approximately:

• OP-tee-ka

The stress is on the first syllable:

• ÓP-ti-ca

A few pronunciation notes:

• ó = like the o in a clear Spanish oh
• ti = roughly tee
• ca = ka

So:

• La óptica abre hoy
  sounds roughly like
  la OP-tee-ka A-breh oy

Grammatically, óptica can mean optics, but in this sentence that reading is unlikely.

Why?

• La óptica abre hoy strongly suggests a place or business that can open
• A science or academic subject does not normally open

So the context pushes the meaning toward:

• optician’s shop
• optical store

If you meant the science, the sentence would usually be in a very different context.

Yes, the use of óptica to mean optician’s shop / optical store is very natural in Spain.

A native speaker in Spain would readily understand:

• La óptica abre hoy.

This kind of sentence is common for talking about:

• shop opening days
• business hours
• whether a store is open on Sundays or holidays