Transillumination in Microscopy
- Transillumination is the illumination of a sample by transmitted light.
- It generates a bright field image.
- Transillumination techniques include phase contrast and differential interference contrast microscopy.

Transillumination in Medicine
- Transillumination refers to the transmission of light through tissues of the body.
- It is commonly used in analyzing organs such as sinuses, breasts, and testes.
- paediatricians use transillumination to observe the amount of scattered light in infants.
- Diagnostic applications of transillumination include detecting hydrocele and differentiating it from testicular neoplasms.
- Transillumination can also be used to diagnose conditions like hydranencephaly and pneumothorax.

Transillumination in Dentistry
- Transillumination with bright light can highlight dental caries.
- It can also reveal signs of dental trauma, such as enamel infractions.

Other Applications of Transillumination
- Transillumination can be used to verify the integrity of egg yolks by observing their opacity.
- Julius Bruck invented a water-cooled diaphanoscopic instrument in 1867.

Additional Resources
- Junnila et al. published an article on testicular masses in the American Family Physician journal.
- The Wikipedia page on Transillumination provides additional references and information.