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Shanghai Jiahui Optical Instrument Co.,Ltd
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    • Optometry Equipment
      • Auto Ref/Keratometer
        • Auto Refractometer/ Keratometer
        • Fully Automatic Refractometer/ Keratometer
      • Chart Projector | Chart Vision
      • Cross Cylinder | Flipper | Prism
      • Optical Biometer
      • Optometry Chairs
      • Optometry Electric Table
      • Near Chart Vision
      • Refraction Chair Unit
      • Optometry Practice Eye
      • Phoroptor Stands
      • Phoropter
      • PD Meter | PD Ruler
      • Trial Frame
      • Trial Lens Set
      • Visual Chart Light Box
    • Medical Ophthalmic Instruments
      • Corneal Topography
      • Eyepiece Adapter
      • Exophthalmometer
      • Fundus(Retinal) Camera/FFA
      • Keratometer
      • Laser Ophthalmology
      • OCT
      • Operation Microscope
      • Ophthalmic Ultrasound
      • Ocular Surface Analyzer
      • Ophthalmoscope | Retinoscope
      • Phaco Emulsifier
      • Shadowless Operating Lamp
      • Slit Lamp Digital Portable
      • Slit Lamp Microscope
        • S Series Slit Lamp
        • BL Series Slit Lamp
        • YZ Series Slit Lamp
        • LS Series Slit Lamps
      • Surgical Instruments
      • Synoptophore
      • Tonometer
      • Visual Field Screener(Perimeter)
    • Lens Edging Equipment
      • Auto Lens Edger
      • Auto Lens Groover
      • Auto Lens Meter
      • Auto Lens Beveller
      • Centering Machine (Blocker)
      • Frame Warmer
      • Hand Lens Edger
      • Hand Lens Meter
      • Lens Cutter | Pattern Opener
      • Lens Drilling | Notch-Cutting
      • Lens Thinning Machines
      • Lens Polisher
      • Pattern Drilling Machine
      • Tint Bath | Tinting Tool
      • Ultrasonic Cleaners
    • Optometry Combination
    • Eyeglasses
      • Adult Optical Frames
        • Super light ultem optical frames
        • Pure titanium optical frames
        • Rimless Optical Frames
        • Stainless steel optical frames
        • TR90 Optical Frames
        • Titanium alloy optical frames
        • Metal alloy frames
        • Acetate frames
        • Aluminium magnesium optical frames
      • Adult Sunglasses
        • PC Sunglasses
        • Acetate Sunglasses.
        • TR90 Sunglasses.
        • Metal Alloy Sunglasses
        • Aluminium Magnesium Sunglasses
      • Polarized Clip Set Glasses
      • Kid Sunglasses
        • Kid TPEE Polarized Sunglasses
        • Nylon Kid Polarized Sunglasses
        • Kid Acetate Polarized Sunglasses
        • Kid Nylon Lens Sunglasses
        • Kid photochormic polarized sunglasses
      • Kid Optical Frames
        • Kid PPSU Optical Frames
        • Kid Removable Temple Optical Frames
        • Kid TR90 & TPU Optical Frames
        • Kid Acetate Optical Frames
        • Kid One-Piece Nylon Elastomer Optical Frames
        • Kid Polarized Set glasses
      • Goggles
        • Swimming Goggles
        • Ski Goggles
        • Tactical Goggles
        • Motorcross Goggles
        • Fire Goggles
        • Protective Goggles
        • Pet Goggles
        • Golf Ball Seeking Glasses
      • Reading Glasses
    • Lenses
    • Visual Function Testing
    • Eyeglasses Tools | Kits
      • Lens marker pens
      • Eyeglasses Pliers
      • Glasses Tool Set
      • Job Tray | Storage Box
      • Lens & Frame Measure Tools
      • Lens Tester | Contact Lens Projector
      • Nylon Thread | Lens Washers
      • Ear hooks & temple tips
      • Screw Extractor | Other Tools
      • Lens Clearning Solution
      • Contact lens cases
      • Lens Pads
      • Lens patterns
      • Lens Sucker
      • Polarization Test Cards
      • Mirrors
      • Glasses Screws | Rimless Supplies
      • Nose Pads | Kits
    • Glasses Cloth
    • Glasses Cases | Bags
    • Glasses Cords
      • Pearl Glasses Cords
      • Fabric Glasses Cords
      • Leather Glasses Cords
      • Metal Glasses Cords
      • Silicone Glasses Cords
      • String Bead Glasses Cords
    • Glasses Cord Displays
    • Glasses Display Stands
    • Low Vision Magnifiers
      • Cylinder Magnifier
      • Desktop Microscope
      • Foldable Magnifier
      • Glasses Type Magnifier
      • Handle Magnifier
      • Monocular Holding Magnifier
      • Paperweight Magnifier
      • Reticle Stand Magnifier
      • Telescopes
      • Torch Magnifier
    • Accessories
      • Chart Projector & Vision Accessories
      • Auto Refractometer Accessories
      • Lens Edger Accessories
      • Lens Groover Accessories
      • Lens Meter Accessories
      • Lens Polisher Accessories
      • Ophthalmic Medical Lamps
      • Ophthalmoscope/ Retinosocpe Accessories
      • Operation Microscopes Accessories
      • Optometry Table Accessories
      • Phoropter Accessories
      • Slit Lamp Accessories
      • Tonometer Accessories
  • Articles
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    Optometry Articles

    HomeArticles Optometry Articles
    2025 World Glasses Exhibitions
    2024-11-14

    2025 World Glasses Exhibitions

    2025 World Glasses Exhibitions...

    Optometry Articles
    How to use the differnent lenses in the trial lens set
    2024-09-20

    How to use the differnent lenses in the trial lens set

    Spheres : The curved surface forms a part of the spherical lens and the dioptric power on all axis positions is the same. After passing the lens, the light beam focuses in one point (or a virtual focus). Spherical lens includes concave lens ( - ) and conv...

    Optometry Articles
    Why do you get presbyopia?
    2024-05-06

    Why do you get presbyopia?

    Presbyopia is a physiological phenomenon that generally begins to appear between the ages of 40 and 45, as the eyes age, the elasticity of the crystalline lens weakens, meaning that the camera lens cannot freely retract and retract, resulting in the objec...

    Optometry Articles
    Glasses that can prevent blue light from irritating the eyes
    2024-03-28

    Glasses that can prevent blue light from irritating the eyes

    Blue light is divided into two types: beneficial and harmful, the blue light with wavelengths between 415 and 455 nanometers is harmful blue light in short waves and requires special attention to protection...

    Optometry Articles
    2024 World Glasses Exhibition Times
    2024-03-13

    2024 World Glasses Exhibition Times

    There are 18 worldwide Glasses Exhibition in 2024, check the detail date here......

    Optometry Articles
    How to understand the difference between blue film and green film on lenses?
    2016-05-02

    How to understand the difference between blue film and green film on lenses?

    When purchasing lenses, many people may find that they do not understand why they choose to coating lenses that are resistant to blue light, and the differences between film layers are not very clear. So, let's popularize the most common blue film and gre...

    Optometry Articles
    What is the difference between anti blue light and anti radiation glasses?
    2016-05-02

    What is the difference between anti blue light and anti radiation glasses?

    block ultraviolet and electromagnetic radiation, but radiation resistant glasses cannot prevent blue light...

    Optometry Articles
    What does HMC lens refer to
    2016-05-02

    What does HMC lens refer to

    HMC lenses are high transmittance lenses that can effectively reduce glare and reflection. HMC is the abbreviation for "Hard Multi Coating", which means hard multi-layer coating....

    Optometry Articles
    Myopia prevention and control (Myopia-Nearsightedness)
    2016-05-02

    Myopia prevention and control (Myopia-Nearsightedness)

    About what is Myopia, how it comes, how to prevent and control myopia, what period should pay more attention during child grow up......

    Optometry Articles
    Astigmatism (Theory, Pathophysiology )
    2016-05-02

    Astigmatism (Theory, Pathophysiology )

    Aricale about what is astigmatism. Understanding the theory would be very helpful during the astigmastism examing, prevention, practising ....

    Optometry Articles
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    Articles

    • Optometry Articles
    • Product Articles

    Category

    • Optometry Equipment
      • Auto Ref/Keratometer
        • Auto Refractometer/ Keratometer
        • Fully Automatic Refractometer/ Keratometer
      • Chart Projector | Chart Vision
      • Cross Cylinder | Flipper | Prism
      • Optical Biometer
      • Optometry Chairs
      • Optometry Electric Table
      • Near Chart Vision
      • Refraction Chair Unit
      • Optometry Practice Eye
      • Phoroptor Stands
      • Phoropter
      • PD Meter | PD Ruler
      • Trial Frame
      • Trial Lens Set
      • Visual Chart Light Box
    • Medical Ophthalmic Instruments
      • Corneal Topography
      • Eyepiece Adapter
      • Exophthalmometer
      • Fundus(Retinal) Camera/FFA
      • Keratometer
      • Laser Ophthalmology
      • OCT
      • Operation Microscope
      • Ophthalmic Ultrasound
      • Ocular Surface Analyzer
      • Ophthalmoscope | Retinoscope
      • Phaco Emulsifier
      • Shadowless Operating Lamp
      • Slit Lamp Digital Portable
      • Slit Lamp Microscope
        • S Series Slit Lamp
        • BL Series Slit Lamp
        • YZ Series Slit Lamp
        • LS Series Slit Lamps
      • Surgical Instruments
      • Synoptophore
      • Tonometer
      • Visual Field Screener(Perimeter)
    • Lens Edging Equipment
      • Auto Lens Edger
      • Auto Lens Groover
      • Auto Lens Meter
      • Auto Lens Beveller
      • Centering Machine (Blocker)
      • Frame Warmer
      • Hand Lens Edger
      • Hand Lens Meter
      • Lens Cutter | Pattern Opener
      • Lens Drilling | Notch-Cutting
      • Lens Thinning Machines
      • Lens Polisher
      • Pattern Drilling Machine
      • Tint Bath | Tinting Tool
      • Ultrasonic Cleaners
    • Optometry Combination
    • Eyeglasses
      • Adult Optical Frames
        • Super light ultem optical frames
        • Pure titanium optical frames
        • Rimless Optical Frames
        • Stainless steel optical frames
        • TR90 Optical Frames
        • Titanium alloy optical frames
        • Metal alloy frames
        • Acetate frames
        • Aluminium magnesium optical frames
      • Adult Sunglasses
        • PC Sunglasses
        • Acetate Sunglasses.
        • TR90 Sunglasses.
        • Metal Alloy Sunglasses
        • Aluminium Magnesium Sunglasses
      • Polarized Clip Set Glasses
      • Kid Sunglasses
        • Kid TPEE Polarized Sunglasses
        • Nylon Kid Polarized Sunglasses
        • Kid Acetate Polarized Sunglasses
        • Kid Nylon Lens Sunglasses
        • Kid photochormic polarized sunglasses
      • Kid Optical Frames
        • Kid PPSU Optical Frames
        • Kid Removable Temple Optical Frames
        • Kid TR90 & TPU Optical Frames
        • Kid Acetate Optical Frames
        • Kid One-Piece Nylon Elastomer Optical Frames
        • Kid Polarized Set glasses
      • Goggles
        • Swimming Goggles
        • Ski Goggles
        • Tactical Goggles
        • Motorcross Goggles
        • Fire Goggles
        • Protective Goggles
        • Pet Goggles
        • Golf Ball Seeking Glasses
      • Reading Glasses
    • Lenses
    • Visual Function Testing
    • Eyeglasses Tools | Kits
      • Lens marker pens
      • Eyeglasses Pliers
      • Glasses Tool Set
      • Job Tray | Storage Box
      • Lens & Frame Measure Tools
      • Lens Tester | Contact Lens Projector
      • Nylon Thread | Lens Washers
      • Ear hooks & temple tips
      • Screw Extractor | Other Tools
      • Lens Clearning Solution
      • Contact lens cases
      • Lens Pads
      • Lens patterns
      • Lens Sucker
      • Polarization Test Cards
      • Mirrors
      • Glasses Screws | Rimless Supplies
      • Nose Pads | Kits
    • Glasses Cloth
    • Glasses Cases | Bags
    • Glasses Cords
      • Pearl Glasses Cords
      • Fabric Glasses Cords
      • Leather Glasses Cords
      • Metal Glasses Cords
      • Silicone Glasses Cords
      • String Bead Glasses Cords
    • Glasses Cord Displays
    • Glasses Display Stands
    • Low Vision Magnifiers
      • Cylinder Magnifier
      • Desktop Microscope
      • Foldable Magnifier
      • Glasses Type Magnifier
      • Handle Magnifier
      • Monocular Holding Magnifier
      • Paperweight Magnifier
      • Reticle Stand Magnifier
      • Telescopes
      • Torch Magnifier
    • Accessories
      • Chart Projector & Vision Accessories
      • Auto Refractometer Accessories
      • Lens Edger Accessories
      • Lens Groover Accessories
      • Lens Meter Accessories
      • Lens Polisher Accessories
      • Ophthalmic Medical Lamps
      • Ophthalmoscope/ Retinosocpe Accessories
      • Operation Microscopes Accessories
      • Optometry Table Accessories
      • Phoropter Accessories
      • Slit Lamp Accessories
      • Tonometer Accessories

    Latest Post

    • How to set lens groove style with a groover
      How to set lens groove style with a groover
      2024-12-06 12:38:01
    • 2025 World Glasses Exhibitions
      2025 World Glasses Exhibitions
      2024-11-14 11:54:40
    • How to use the portable fundus camera,
      How to use the portable fundus camera,
      2024-11-04 09:55:58

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    008613818330937

    jiahe@jhoptical.com

    yiyang.li.cn

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