A device (100, 600) for evaluating Young's modulus of a material, the device comprising: a sensing component, the sensing component comprising: a sensing layer (108, 606) having a property or dimension that is pressure sensitive; a light source for emission of electromagnetic radiation into at least the sensing layer; and a receiver for electromagnetic radiation arranged to receive electromagnetic radiation that has interacted with at least a portion of the sensing layer (108, 606); wherein the sensing component is arranged such that, when the sensing layer (108, 606) is positioned at a surface area of the material and a load is applied to at least a portion of the surface area of the material and through the sensing layer (108, 606), received electromagnetic radiation that interacted with the sensing layer (108, 606) can be used to determine strain within at least the portion of the sensing layer (108, 606); wherein the sensing layer (108, 606) has a known stiffness and the electromagnetic radiation can be used to determine stress within the sensing layer (108, 606) from the determined strain; and wherein the device (100,600) is also arranged to determine strain within a portion of the material such that the Young's modulus of the material can be determined using the determined strain within the portion of material and the determined stress at the portion of the sensing layer (108, 606); characterised in that the device (100, 600) comprises an element for attaching the sensing component to a body portion of a user whereby the element with the sensing component is wearable by the user and such that movement or positioning of the sensing component can be controlled via the body portion of a user and whereby the device (100, 600) is arranged to employ optical coherence elastography to determine strain distributed within the material, and the sensing layer is incorporated in or attached to one or more finger portions of a glove or attached to a thimble. a sensing layer (108, 606) having a property or dimension that is pressure sensitive; a light source for emission of electromagnetic radiation into at least the sensing layer; and a receiver for electromagnetic radiation arranged to receive electromagnetic radiation that has interacted with at least a portion of the sensing layer (108, 606); wherein the sensing component is arranged such that, when the sensing layer (108, 606) is positioned at a surface area of the material and a load is applied to at least a portion of the surface area of the material and through the sensing layer (108, 606), received electromagnetic radiation that interacted with the sensing layer (108, 606) can be used to determine strain within at least the portion of the sensing layer (108, 606); wherein the sensing layer (108, 606) has a known stiffness and the electromagnetic radiation can be used to determine stress within the sensing layer (108, 606) from the determined strain; and wherein the device (100,600) is also arranged to determine strain within a portion of the material such that the Young's modulus of the material can be determined using the determined strain within the portion of material and the determined stress at the portion of the sensing layer (108, 606); characterised in that the device (100, 600) comprises an element for attaching the sensing component to a body portion of a user whereby the element with the sensing component is wearable by the user and such that movement or positioning of the sensing component can be controlled via the body portion of a user and whereby the device (100, 600) is arranged to employ optical coherence elastography to determine strain distributed within the material, and the sensing layer is incorporated in or attached to one or more finger portions of a glove or attached to a thimble.