Topcon Myah Biometer & Corneal Topographer

Brand: Topcon


The Topcon Myah Biometer & Corneal Topographer offers an efficient, affordable and repeatable way to baseline axial length and monitor change over time.

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This Topcon Myah Biometer & Corneal Topographer is a versatile instrument that also includes corneal topography, pupillometry, anterior cornea wavefront analysis and contact lens fitting tools making it a comprehensive device for monitoring axial length, evaluating the corneal surface, assessing visual quality and fitting specialty lenses. Analysis tools plot changes in axial length, refraction and corneal power; highlight differences in corneal shape between visits; and map higher order aberrations.


    • TOPOGRAPHY – Corneal topography with visit-to-visit comparison and white-to-white measurements
    • PUPIL ASSESSMENT – Dynamic pupillometry assesses size and light reflexes of the pupil
    • LENS FITTING – Contact lens fitting tools including database of conventional RGP, Ortho-K lenses and fluorescein simulation
    • ABERRATION MAPS – Simulate the effects of higher order aberrations on visual quality
    • USER-FRIENDLY – Compact and easy to operate
    • EASILY REVIEW DATA – Access patient data on any connected PC in your network


    Keratoscope cone

    24 rings equally distributed on a 43D sphere

    Analyzed points

    Over 100.000

    Measured points

    over 6.000

    Corneal coverage

    Up to 9.8mm on a sphere of radius 8.00mm (42.2 diopters with n=1.3375)

    Diopter power range

    28.00 – 67.50 D


    0.01 D, 0,01mm

    Axial Biometry

    Low-coherence interferometry on optical fiber (SLED @ 820 nm)

    Capture system

    Guided focus 


    LCD 10.1 inch capacitive touch screen




    Dynamic, Photopic, Mesopic, Scotopic


    Corneal map, Comparison map, Contact lens, Height map, Zernike analysis, Pupillometry,
    Rx/AL Trend analysis

    Working environment

    10 °C – 40 °C, Relative humidity 8 – 75% (no condensing), Atmospheric pressure 800 – 1060 hPa

    Power source

    AC 100 – 240 V 50/60 Hz

    Power consumption

    100 VA


    320 mm (W) x 490 mm (H) x 470 mm (L), 18 Kg

    External Connections

    LAN integrated, 2x USB

    Printing options

    USB printer, Network printer, PDF on network shared folder, PDF on USB
    PDF or Image on network folder or on USB

    Operating System

    Windows 10 64-bit



    Hard Disk

    500 GB