11/20/2009 - Capt. Luanne Danes uses a light to check the anterior segment of Master Sgt. Timothy Vanderhoff's eye during his visit to the Optometry Clinic Nov. 19 at Eielson Air Force Base, Alaska. Captain Danes is looking for healthy structure of the eye and ensuring no corneal disease is present. Captain Danes, officer in charge of Optometry, is assigned to the 354th Medical Operation Squadron. Sergeant Vanderhoff, crew chief, is assigned to the 168th Aircraft Maintenance Squadron. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)

11/20/2009 - Master Sgt. Timothy Vanderhoff conducts a near point reading test during his visit to the Optometry Clinic Nov. 19 at Eielson Air Force Base, Alaska. The testing is to determine how well patients read small text. Sergeant Vanderhoff is a crew chief assigned to the 168th Aircraft Maintenance Squadron. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)

11/20/2009 - Capt. Luanne Danes checks the pupils of Master Sgt. Timothy Vanderhoff during his visit to the Optometry Clinic Nov. 19 at Eielson Air Force Base, Alaska. Captain Danes, officer in charge of Optometry, is assigned to the 354th Medical Operation Squadron. Sergeant Vanderhoff, crew chief, is assigned to the 168th Aircraft Maintenance Squadron. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)