When is cryo vs laser used on retina?

Visibility: Cryo and laser are used to reattach retinas and deal with bleeding. Cryo is a little cruder but can be used when there is a lack of direct visibility. It is applied outside the eye directed to the inside. Laser requires a visible pathway, is more precise and is applied to the inside. Your retinal surgeon will decide which is best for your problem.

Laser: first choice: For most applications, laser is preferable, because it can achieve the objectives with less pain, inflammation, and scarring. Cryotherapy is used when laser is not possible, such as when the view of the inside of the eye is too poor, or if the treated area is too far forward and can't be seen with the laser device.