An ocular applicator for an application by injection of medical or diagnostic liquids and / or liquids for the alteration of refraction in the corneal tissues, composed of a main body (1) that is configured to contain one or more application needles, which they can be fixed to the main body (1) through a segment (3), whereby the main body (1) is a conical or cylindrical ring with at least one lateral notch (1a), and the segment (3) which is a hollow body, has its outer surface shaped to correspond to the surface of a cavity in the main body (1), so that the segment (3) is capable of rotating inside said cavity, said segment (3), which has at least one base (3.1) with an opening (3.2), contains at least two replaceable needle holders (2), adapted to hold the application needles on their curved front surfaces and on their side faces that are equipped with protrusions (2.1 ) That they are housed in arc-shaped grooves (3.3) that are created on the inner side of the base (3.1) of the segment (3), so that said needle holders (2) are fixedly movable with respect to the segment (3) and can move in a centripetal or centrifugal direction when the segment is rotated within the main body.Un aplicador ocular para una aplicación por inyección de líquidos médicos o de diagnóstico y/o líquidos para la alteración de la refracción en los tejidos corneales, compuesto por un cuerpo principal (1) que está configurado para contener una o más agujas de aplicación, que pueden fijarse al cuerpo principal (1) a través de un segmento (3), por lo que el cuerpo principal (1) es un anillo cónico o cilíndrico con al menos una muesca lateral (1a), y el segmento (3) que es un cuerpo hueco, tiene su superficie externa conformada para corresponder con la superficie de una cavidad en el cuerpo principal (1), de manera que el segmento (3) es capaz de girar en el interior de dicha cavidad, dicho segmento (3), que tiene al menos una base (3.1) con una abertura (3.2), contiene al menos dos portagujas reem
