An apparatus for optical treatments, comprising: an interface configured to receive first information related to the parameters of a treatment for improving the mental or physical condition of at least one user; radiation members (108A, 108B) configured to be carried by the user in the ears of the user and deliver optical radiation energy to illuminate an optically sensitive tissue of the user directly through an external auditory canal (110A and 110B) of the user for curing or alleviating a predetermined disease; wherein the interface is further configured to receive second information comprising at least two different indicators (800A, 800B) indicating whether the optical treatment is successful or not, wherein the second information is different from the first information; and the apparatus further comprises a processor configured to: apply an individual predetermined weighting coefficient (804A, 804B) to each of the at least two indicators (800A, 800B) received, wherein the value of a given weighting coefficient is based on the implication the indicator gives in relation to the successfulness or unsuccessfulness of the optical treatment in curing or alleviating the predetermined disease; combine the weighted at least two indicators to a joint indicator value, wherein the joint indictor value represents the successfulness or unsuccessfulness of the optical treatment in curing or alleviating the predetermined disease; and determine whether the parameter values of the optical treatment apparatus are to be modified or not, on the basis of the received first information and the joint indicator value. an interface configured to receive first information related to the parameters of a treatment for improving the mental or physical condition of at least one user; radiation members (108A, 108B) configured to be carried by the user in the ears of the user and deliver optical radiation energy to illuminate an optically sensitive tissue of the user directly through an external auditory canal (110A and 110B) of the user for curing or alleviating a predetermined disease; wherein the interface is further configured to receive second information comprising at least two different indicators (800A, 800B) indicating whether the optical treatment is successful or not, wherein the second information is different from the first information; and the apparatus further comprises a processor configured to: apply an individual predetermined weighting coefficient (804A, 804B) to each of the at least two indicators (800A, 800B) received, wherein the value of a given weighting coefficient is based on the implication the indicator gives in relation to the successfulness or unsuccessfulness of the optical treatment in curing or alleviating the predetermined disease; combine the weighted at least two indicators to a joint indicator value, wherein the joint indictor value represents the successfulness or unsuccessfulness of the optical treatment in curing or alleviating the predetermined disease; and determine whether the parameter values of the optical treatment apparatus are to be modified or not, on the basis of the received first information and the joint indicator value.