What are the photo requirements for Vietnam visa on arrival?

With Vietnam visa on arrival, the visa applicants must prepare two passport sized photos (one to be glued on the Vietnamese application form which will be sent to you together with your visa approval letter and the other to be presented to the immigration officer at the airport in Vietnam) to get visa stamped onto the passport at the arrival airport in Vietnam. 

The photos may be in color or black and white. They must be full face, front view with a plain white or off-white background.

 The photos should be taken in normal street attire, without a hat or headgear that obscures the hair or hairline.

 Uniforms should not be worn in the photograph with the exception of religious attire which is worn daily.

 If prescription glasses, a hearing device, wig or similar articles are normally and consistently worn, they should be worn when the picture is taken.

 Dark glasses or nonprescription glasses with tinted lenses are not acceptable unless required for medical reasons. A medical certificate may be required to support the wearing of such glasses in the photo.