File:Geraet beim Optiker.jpg

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Summary[edit]

Summary
Description	Atlantic Ocean (Mar. 05, 2004) – Hospital Corpsman Brian Long, of Sellersville, Pa., attempts to read a standard eye chart from twenty feet with the help of an Optical Refractor aboard the aircraft carrier USS John F. Kennedy (CV 67). The Refractor is an instrument used to measure deficits in vision acuity so corrective lenses can be prescribed. Corrections include astigmatism, near sighted, and farsighted vision problems. John F. Kennedy and her Carrier Strike Group (CSG) are conducting Composite Training Unit Exercises (COMPTUEX) while preparing for future deployment.
Source	Wikimedia Commons file page
Author	U.S. Navy photo by Photographer's Mate 3rd Class Christian Weibull.
Permission	See original Commons license details.

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Original attribution and file history: Wikimedia Commons

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	13:40, 8 June 2026		2,100 × 1,500 (302 KB)	Maintenance script (talk \| contribs)	== Summary == Importing file

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Metadata

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Camera manufacturer	NIKON CORPORATION
Camera model	NIKON D100
Author	PH3 Christian Weibull
Exposure time	1/1 sec (1)
F Number	f/22
Date and time of data generation	21:59, 15 February 2002
Lens focal length	12 mm
Headline	THE REFRACTOR
Credit/Provider	U.S Navy
Source	Navy Visual News Service
Image title	040305-N-4190W-001ATLANTIC OCEAN, MAR 05, 2004. HOSPITALMAN BRIAN LONG FROM SELLERSVILLE, PA PREPARES TO TRY AND READ A STANDARD EYE CHART FROM 20 FEET AWAY WITH HELP FROM A REFRACTOR ONBOARD USS JOHN F. KENNEDY, (CV67). A REFRACTOR IS AN INSTRUMENT USED TO PRESCRIBE THE POWER OF A LENS TO CORRECT YOUR VISION TO 20/20 OR CLOSE TO. IT CAN ACCOMODATE FOR ASTIGMATISM, NEAR, AND DISTANT VISION.THE KENNEDY AND HER BATTLE GROUP ARE CONDUCTING A COMPOSITE TRAINING UNIT EXERCISE, (COMPTUEX), WHICH IS AN INTERMEDIATE LEVEL EXERCISE DESIGNED TO FORGE THE STRIKE GROUP INTO A COHESIVE FIGHTING TEAM AND IS A CRITICAL STEP IN PREDEPLOYMENT TRAINING.USN PHOTO BY: PHOTOGRAPHER'S MATE THIRD CLASS CHRISTIAN WEIBULL
Short title	040305-N-4190W-001
Orientation	Normal
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	Adobe Photoshop 7.0
File change date and time	16:18, 8 March 2004
Y and C positioning	Co-sited
Exposure Program	Manual
Exif version	2.2
Date and time of digitizing	21:59, 15 February 2002
Meaning of each component	Y Cb Cr does not exist
Image compression mode	4
APEX exposure bias	0
Maximum land aperture	4 APEX (f/4)
Metering mode	Pattern
Light source	Unknown
Flash	Flash fired, strobe return light detected
DateTime subseconds	00
DateTimeOriginal subseconds	00
DateTimeDigitized subseconds	00
Supported Flashpix version	1
Color space	sRGB
Sensing method	One-chip color area sensor
File source	Digital still camera
Scene type	A directly photographed image
Custom image processing	Normal process
Exposure mode	Manual exposure
White balance	Auto white balance
Digital zoom ratio	1
Focal length in 35 mm film	18 mm
Scene capture type	Standard
Scene control	None
Contrast	Soft
Saturation	Normal
Sharpness	Normal
Subject distance range	Unknown
Writer	Dir. NVNS
Special instructions	Credit as U.S. Navy photo by Christian Weibull.
Category	N
Urgency	5
Supplemental categories	703-614-9154 navyvisualnews@navy.mil UNCLASSFIED
Keywords	sailor pa eye exam uss john f. kennedy cv 67 aircraft carrier eye chart refractor instrument comptuex composite training unit exercis
IIM version	2