A system for visually examining dental tissue, comprising: a first light source having a first peak wavelength; a second light source having a second peak wavelength that is at least 10 nm longer than the first peak wavelength; a processor; an imaging unit; and a memory in communication with the processor, the memory storing programming instructions executable by the processor to: using the imaging unit, capture a first image of dental tissue under the first light source; using the imaging unit, capture a second image of the dental tissue under the second light source; determine a first red value and a first green value associated with a point on the dental tissue as shown in the first image; determine a second red value and a second green value associated with the point on the dental tissue as shown in the second image; create a third image of the dental tissue, where a portion of the third image depicting the point on the dental tissue is adapted using a modification function that is a function of both (i) a relationship between the first red value and the second red value, and (ii) a relationship between the first green value and the second green value, wherein: the relationship between the first red value and the second red value is a ratio of the second red value to the first red value; and the relationship between the first green value and the second green value is a ratio of the first green value to the second green value, characterized in that the modification function is a function of the ratio of the second red value to the first red value, times the ratio of the first green value to the second green value. a first light source having a first peak wavelength; a second light source having a second peak wavelength that is at least 10 nm longer than the first peak wavelength; a processor; an imaging unit; and a memory in communication with the processor, the memory storing programming instructions executable by the processor to: using the imaging unit, capture a first image of dental tissue under the first light source; using the imaging unit, capture a second image of the dental tissue under the second light source; determine a first red value and a first green value associated with a point on the dental tissue as shown in the first image; determine a second red value and a second green value associated with the point on the dental tissue as shown in the second image; create a third image of the dental tissue, where a portion of the third image depicting the point on the dental tissue is adapted using a modification function that is a function of both (i) a relationship between the first red value and the second red value, and (ii) a relationship between the first green value and the second green value, wherein: using the imaging unit, capture a first image of dental tissue under the first light source; using the imaging unit, capture a second image of the dental tissue under the second light source; determine a first red value and a first green value associated with a point on the dental tissue as shown in the first image; determine a second red value and a second green value associated with the point on the dental tissue as shown in the second image; create a third image of the dental tissue, where a portion of the third image depicting the point on the dental tissue is adapted using a modification function that is a function of both (i) a relationship between the first red value and the second red value, and (ii) a relationship between the first green value and the second green value, wherein: (i) a relationship between the first red value and the second red value, and (ii) a relationship between the first green value and the second green value, wherein: the relationship between the first red value and the second red value is a ratio of the second red value to the first red value; and the relationship between the first green value and the second green value is a ratio of the first green value to the second green value, characterized in that the modification function is a function of the ratio of the second red value to the first red value, times the ratio of the first green value to the second green value.