La lentilla está limpia.

In Spain, lentilla commonly means contact lens.

Be careful: it looks a bit like lentil in English, but the Spanish word for the food is usually lenteja, not lentilla.

So in this sentence, La lentilla está limpia means The contact lens is clean.

Because lentilla is a feminine noun in Spanish, so it takes the feminine singular article la.

• la lentilla = the contact lens

This also affects the adjective:

• limpia = clean, feminine singular

Everything matches in gender and number.

Spanish usually uses estar for states or conditions, and ser for more permanent identity or essential characteristics.

Here, clean is treated as a current condition, so Spanish uses estar:

• La lentilla está limpia = The contact lens is clean

Using es here would usually sound unnatural if you simply mean that the lens is clean right now.

Because adjectives in Spanish usually agree with the noun they describe.

Since lentilla is:

• feminine
• singular

the adjective must also be:

• feminine singular

So:

• limpio = masculine singular
• limpia = feminine singular

That is why you get La lentilla está limpia.

The plural version is:

Las lentillas están limpias.

Changes:

• la → las
• lentilla → lentillas
• está → están
• limpia → limpias

Everything changes to match the plural noun.

Yes. Mi lentilla está limpia is correct and means My contact lens is clean.

Spanish often uses the definite article la when the object is clear from context, especially in everyday speech. So both can work:

• La lentilla está limpia = The contact lens is clean
• Mi lentilla está limpia = My contact lens is clean

Using mi makes the ownership explicit.

In Spanish, descriptive adjectives often come after the noun.

So:

• la lentilla limpia = the clean contact lens

In this sentence, the adjective comes after estar:

• La lentilla está limpia

That is the normal pattern:

• noun + estar
  • adjective

Putting limpia before lentilla would sound unusual here.

Está has a written accent because the stress falls on the last syllable: es-TÁ.

The accent mark also helps distinguish it from esta, which can mean:

• this (feminine), as in esta lentilla = this contact lens

So:

• esta = this
• está = is

That accent is important.

A simple pronunciation guide is:

lah len-TEE-yah es-TAH LEEM-pyah

A few notes:

• ll in lentilla is usually pronounced like y in much of Spain
• ti in lentilla sounds like tee
• limpia has a pya-type ending

So it flows roughly like: lah len-TEE-yah es-TAH LEEM-pyah

Not always. Lentilla is especially common in Spain for contact lens.

In other Spanish-speaking countries, people may more often say:

• lente de contacto
• lente
• contacto in some contexts

So if you are learning Spanish from Spain, lentilla is a very useful word.

Yes, if the context already makes it clear what you are talking about.

For example, if someone is holding the contact lens and asks about it, you could say:

Está limpia. = It is clean.

Spanish often leaves out information that is already obvious from context.

But if you want to name the object clearly, you say: La lentilla está limpia.

Yes, in this sentence limpia means clean in the ordinary physical sense.

It describes the condition of the contact lens: it is not dirty.

This is a very common use of limpio / limpia:

• El vaso está limpio = The glass is clean
• La camisa está limpia = The shirt is clean
• La lentilla está limpia = The contact lens is clean

So the pattern is very useful beyond this one sentence.