Skip to main content
U.S. Department of Health & Human Services
Search the NIH Website
Virtual Tour
Staff Directory
En Español
Site Menu
Home
Health Information
Health Care Providers & Facilities
Health Info Lines
HealthCare.gov
Science Education Resources
NIH Clinical Research Trials and You
Talking to Your Doctor
More »
Search Health Topics
Quick Links
MedlinePlus Health Info
NIH News in Health
Wellness Toolkits
Grants & Funding
Grants Home Page
Find Funding
Due Dates
How to Apply
About Grants
Policy & Compliance
Grants News/Blog
Contracts
Loan Repayment
More »
Quick Links
RePORT
eRA Commons
NIH Common Fund
News & Events
News Releases
Digital Media Kits
Media Resources
Media Contacts
Images and B-roll
Events
Social Media
More »
Quick Links
NIH News in Health
NIH Research Matters
NIH Record
Research & Training
Medical Research Initiatives
Science Highlights
Science Education
Research in NIH Labs & Clinics
Training Opportunities
Library Resources
Research Resources
Clinical Research Resources
Safety, Regulation and Guidance
More »
Quick Links
PubMed
Stem Cell Information
OppNet
NIDB
NIH Blueprint for Neuroscience Research
Institutes at NIH
List of Institutes and Centers
NIH Office of the Director
Directors of NIH Institutes and Centers
NIH Institute and Center Contact Information
More »
Quick Links
NCI
NEI
NHLBI
NHGRI
NIA
NIAAA
NIAID
NIAMS
NIBIB
NICHD
NIDCD
NIDCR
NIDDK
NIDA
NIEHS
NIGMS
NIMH
NIMHD
NINDS
NINR
NLM
CC
CIT
CSR
FIC
NCATS
NCCIH
About NIH
Who We Are
What We Do
Jobs at NIH
Visitor Information
Frequently Asked Questions
Contact Us
More »
Quick Links
The NIH Director
Take the Virtual Tour
NIH…Turning Discovery Into Health
®
Impact of NIH Research
Science, Health, and Public Trust
You are here
Home
closeup-phoropter.jpg
Media Folder
health-info
Title
A closeup of a phoropter
Description
A closeup of a phoropter
OD
Site_Section
Health Information
Alt Text
A closeup of a phoropter
Connect with Us
Contact Us
X
Facebook
Instagram
YouTube
Flickr
More Social Media from NIH
Back to Top
