A visitor visa extension is available to individuals who are already in the country on a valid visitor visa and wish to stay longer. Eligible applicants must ensure their current status is still valid at the time of applying. They need to provide a clear explanation for the extension request, proof of sufficient funds, and evidence of ties to their home country. Applicants should also demonstrate good compliance with immigration rules and maintain a clean record during their stay. Ultimately, eligibility depends on presenting genuine reasons for staying longer and the ability to support oneself throughout the extended period.