Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
Red laser on optical table in physics laboratory, solid-state laser installation in physical laboratory
The mid adult female lab technician wears protective gloves as she adjusts the settings on the microscope to get a better view of her slide.
Hand holding trial frame glasses, eyeglasses in hand
Photo of optometrist examining patient's eyes in ophthalmology clinic.
Ophthalmologist examining patient's eyes. Side view of White man is checking the eye vision with phoropter eyesight measurement testing machine. Medical check up. Handsome man getting an eye exam at ophthalmology clinic. Checking retina of a male eye close-up.
Doctor testing for eyes with special optical apparatus in modern clinic. Ophthalmologist examining eyes of a patient using digital microscope during a medical examination in the ophthalmologic office
Phoropter optical clinical testing machine, equipment, instrument in optic store with wall in the background used by optican for tesing clients' eye sight, eye care for making new eyeglasses.
Phoropter and eyeglasses in eye store.
Vision, eye test and woman consulting optometrist for eye exam, health and sight, happy and relax. Eyes, customer and girl with ophthalmologist in a clinic for treatment, diagnosis and eyesight
Optometrist diopter. optical phoropter
Patient on diagnostic of vision, oculist cabinet. Optician measuring a woman's eyesight. Young woman visiting ophthalmologist in clinic. Optometrist checking vision of young beautiful woman.
Human eye and graphical interface. Smart wearable technology concept
Silicon wafer with microchips on machine process examining in microscope and checking quality on monitor of PC
Female Patient Looking Through On Phoropter At Ophthalmology Clinic
Testing of electronic equipment
Sunglasses lens on a table
Doctor using an external lens for pupil dilation
Machine checking silicon wafers in clean room laboratory, close up. Silicon Wafers and Microcircuits with Automation system control application on automate robot arm
Smiling cheerful young female patient being checked by an elderly male ophthalmic doctor
Machine part in a semiconductor manufacturing facility
Vision, optometry and healthcare in an optician office with an ophthalmic phoropter machine for testing. Hospital, medical and eye health with test equipment in an empty room at the optometrist
Medicine, Lens - Optical Instrument, Equipment, Optical Instrument, China - East Asia
Optician is scanning the QR code on the glasses with an optical reader.
High technology concept health for eyes care - The optician ophthalmology doctor optometrist in the eyes clinic using a binocular slit-lamp to a young woman for an eye control.
Woman, eye exam and optometrist vision health test for healthy eyecare, eye machine and equipment for testing eyes. Optician, ophthalmologist and clinic for free test for new glasses or contact lense
Phoropter for eye test, lenses glasses for eye check in optical store
Machine for testing samples for tensile strength.
Ophthalmologist Checking The Eye Vision Of Female Patient At Clinic
Male dentist in special glasses with magnifying glasses and mask. Medical worker.
Patient getting an eye exam at the ophthalmologist - healthcare and medicine concepts
Free Images: "bestof:OpticalGlass 017.jpg NBS glass operations National Institute of Standards and Technology National Institute of Standards and Technology PD-USGov-NIST PD-USGov"
Chemistry, calibrations, mercury emissions (5940996728).jpg
Narwhals_breach.jpg
Cobia (7152180729).jpg
Metafilms; Sub-wavelength resonators (5884301049).jpg
New Accreditation Program for Body Armor Testing Laboratories (5941061708).jpg
Common Murres (5940478571).jpg
Standards for Radiation Detection (5940488991).jpg
Near-field Antenna Measurements (5941062964).jpg
New PML Lab (7093349409).jpg
Identifying Automotive Emissions (5941045842).jpg
NRC (5888575550).jpg
Lab-on-a-Chip (5885283580).jpg
NIST Pins Down Imaging System for the Blind (5884515996).jpg
Error Correction (5884515900).jpg
Concrete Strength Testing (5888202462).jpg
NIST Nobel Laureate Explains (5941059340).jpg
Laser Tracker (5940486369).jpg
Hawksbill Sea Turtle (7454788426).jpg
Transition Edge X-ray Sensor (5884305363).jpg
Advanced Measurement Laboratory; Nanofabrication Facility; Chip Ovens (5884870010).jpg
Ultrafast Photon Detector (5881388183).jpg
Iron-based and Copper-Oxide High-Temperature Superconductors (5884302103).jpg
Multi-layered Mirror (5881388485).jpg
Calibrating Infrared Detectors (5881382145).jpg
NIST engineer Kate Remley (6052872100).jpg
Advanced Measurement Laboratory; Night View (5941021430).jpg
Standard Reference Materials Preparation (5941085050).jpg
NIST Antenna Calibrations Extended to 60-110 GHz (5941062520).jpg
Tissue Engineering; Biomaterials for the Heart (5881107872).jpg
Coordinate Measuring Machine (5940440685).jpg
New Instrument Tests the Metal of WTC Steel (5940503481).jpg
Kilogram (blue) (5940489901).jpg
Kilogram (gold) (5941049018).jpg
John Hagedorn (5884514054).jpg
Bringing Polymer Patterns into Focus (5940988602).jpg
Time & Frequency; Atomic Clocks (5881386915).jpg
Homeland Security; World Trade Center; Steel Fireproofing (5941047642).jpg
Cloud Computing (6648686983).jpg
Forensic DNA Analysis (5881109656).jpg
MACS, Multi-Axis Crystal Spectrometer (5888574314).jpg
Converting Digital Information into Braille (5883951271).jpg
Digital Fingerprint Scanner (6648687021).jpg
New Imaging Tool is Boon to Fuel Cell Research (5880686731).jpg
Real-time Quality Control for Welding (5884928619).jpg
AFM 2 (5940986486).jpg
Scientists examine vial.jpg
Man responds to telephone call.jpg
Computer tapes.jpg
Pathologists looking into microscopes.jpg
Pre-Sunset Surat.jpg
Galactic Cntr half Edit 1.jpg
Low-fat dairy food.jpg
The Galactic Center.jpg
Galactic Cntr full cropped.jpg
front-window-glass-technology-59098.jpg
5aday_sweet_potato.jpg
Baked chicken.jpg
Peanuts (1).jpg
Sausage biscuit.jpg
Deli sandwiches.jpg
Slices of bread.jpg
Tomato (1).jpg
Clasped hands.jpg
Nurse administers a vaccine.jpg
Doctor and couple talking.jpg
Doctor and couple talking (1).jpg
Couple consults with doctor.jpg
Couple consults with doctor (1).jpg
Couple outdoors (5).jpg
Doctor takes blood pressure.jpg
Family portrait.jpg
Librarian accessing pdq.jpg
Walking in a shopping mall.jpg
Beach_Clean_up_during_DWH_(8743616725).jpg
Beach_Clean_up_during_DWH_(8743615375).jpg
Women preparing food (2).jpg
Assortment of breads and pastries.jpg
Doctor discusses x-ray with patient.jpg
Nurse administers chemotherapy.jpg
Nurse administers chemotherapy (2).jpg
Nurse poses with cancer patient.jpg
Couple sitting at a kitchen table.jpg
Man consults with pharmacist.jpg
Doctor consults with patient (7).jpg
Doctor consults with patient (8).jpg
Chemical_synapse_schema_cropped.jpg
Operating room.jpg
Nurse administers chemotherapy (1).jpg
Nurse administers oral chemotherapy.jpg
Family eating lunch.jpg
Family eating lunch (1).jpg
Family playing a board game.jpg
Family playing a board game (1).jpg
Family playing board game.jpg
Family at a playground.jpg
Nurse takes a patient's blood pressure.jpg
Children in a classroom.jpg
Oncology doctor consults with patient.jpg
Beach_Clean_up_during_DWH_(8743615835).jpg
Nude mouse (1).jpg
Terms of Use   Search of the Day