If you wish to come to Ireland for 90 days or less, you will need a Short Stay 'C' Visit Visa. Residents of some countries do not need it if they are from the list of visa-exempt countries. You cannot work on this visa in Ireland. This visa does not allow you to rely on Irish public services, for example, public hospitals.

Tourism
A Short Stay 'C' Visit (tourist) Visa allows you to travel to Ireland for up to 90 days for tourism purposes. 

Medical Treatment
A Short Stay 'C' Visit (medical treatment) Visa allows you to come to Ireland for up to 90 days for a medical procedure in a private hospital, subject to the conditions described below. The conditions to get this visa are as follows.

• The medical procedure you need cannot be performed in your home country (your country of permanent residence).
• You have confirmed an appointment with a private hospital in Ireland to carry out the procedure here.
• You have the option of paying fully for the treatment. 

Marriage
If you wish to come to Ireland in order to get married you need this visa. 

Some of the eligibility requirements for this visa are:

• If you are a visa-required national, you must apply for a permit before travelling to Ireland. You can find out if you need a visa here.
• Every traveller needs to apply for a visa separately. There are no family visas.
• A parent or legal guardian should make a tourist visa application for a young person (aged under 18).
• You should not buy travel tickets before you decide on your visa application.

For a A Short Stay' C' Visit Visa, you must submit the below-listed documents to your application office. Provide documents within 30 days of creating an application via AVATS. The provided documents by you must be original.

Note that if you are visting for purpose of tourism, medical or marriage then you need official letters from companies, universities, schools, colleges, etc. These letters must be written on the official letterhead. Also, they must clearly show organization's:

• Complete name
• Postal address
• Website address
• Email address. Note that Hotmail and email address is not accepted.
• Telephone number
• Written signature by an authorized representative. But the electronic signature will not be acceptable. 
• A contact person's name and job title.

Documents for Medical Purpose Visit

The following documents are required for medical purposes.

• Application Summary Sheets
• Letter of referring from hospital
• Letter from your private hospital in Ireland
• Accommodation Plan
• Medical Insurance
• Proof of Fee Payment
• Obligations to Return Home
• Passport photographs

Any official documents issued by a state outside of the EEA or Switzerland, must be attested or apostilled as authentic by the Ministry of Foreign Affairs in your state. These include birth certificates, marriage certificates, death certificates, and divorce certificates etc. They release the document to be accepted as evidence for Irish visa purposes. If necessary, translate your documents into English or Irish.

If your submitted documents are not written in Irish or English, it needs a complete translation. Each document should be translated and must include:

• Verification from the translator that the translation is a perfect match for the original. 
• Date of completion of translation.
• The translator's full name and signature, and their contact information.

Apply for a visa from your homeland. Also, do prepare your application three months in advance of your trip. 

There are three parts to your application process: 

• Apply online for visa.
• Payment of visa application fee.
• Send your passport and other essential documents to be processed.

When to Apply
Prepare your application three months in advance of your trip.

Visa Processing Time
Generally, you can expect a decision about eight weeks after they receive your documents.

Duration
You can stay for less than 90 days.

Fees 
Method of payment and currency options may vary depending on the location. To find out how to pay, contact your application office. Some candidates do not need to pay visa fees. Following is the fee for this visa. 

Single entry - Fee: €60 

Multiple-entry - Fee: €100 

Some applications may be subject to some extra fees. For example, fees for consular services. The visa fee is used to defray the costs associated with processing your application.

This visa is not extendable.  If you wish to stay longer, you'd need to leave the country and apply again for a longer stay visa.  But under specific exceptional circumstances, they may provide an extension, but it is unlikely.

Work
You cannot work with this visa.

Study
The visa does not allow you to study.

Extension
This visa is generally not extended.

Multi-entry
This visa doesn't allow you to leave Ireland and come back again unless you get the multi-entry visa.