Program overview
Developed by a practicing optometrist, this interactive simulator provides students with a platform to test and improve their skill of subjective refraction.
A note of dedication
This project is dedicated to my lecturers and the clinical mentors who have influenced my career in optometry. Their commitment to teaching and clinical excellence has provided the inspiration for this platform. Whilst their names are too many to list, their influence is present in every calculation this program makes.
In the spirit of those who have influenced me, may this tool serve you as well as those who have served me.
Display tip
This program is ideally suited for desktop users however adaptations have been made for laptop and phone users. Please select the option below that matches the device you are using. Mobile users should enable auto-rotate and rotate their phone sideways for the best layout. Desktop users should leave both options below unselected. Browser zoom can also be adjusted for further ease of use.
Choose your mode
Select how you would like to use the simulator.
Choose your clinical case level
Additional settings
Normal patient gives clear and consistent responses allowing you to follow the refraction routine smoothly.
RIGHT EYE
LEFT EYE
Additional settings
Plano starts the refraction from no prescription so you can build the result step by step from the beginning.
Guided refraction prompts provide step-by-step support during the refraction process, helping you follow the correct routine and understand what to do next.
Patient voice-over accent
British and American voice options are included for better compatibility across desktop laptop and mobile devices. The simulator will automatically choose the closest installed voice for the selected accent. Voices can also be muted during the refraction process by clicking the button in the top right corner.
This program is updated periodically to resolve issues and improve the user experience.
Reminder: if cyl is present, first use the red/minus JCC meridian to find the rough axis, then add a minus cyl lens
User reminder: Present the flipper, then wait for the patient response.
RE: 0.00 / 0.00 x 0
LE: 0.00 / 0.00 x 0
SPHERE
Lens 1
0.00
Present plus lens first ↙
CYLINDER
0.00
AXIS
180°
JCC axis mode: drag the slider or type the cyl axis manually above.
Refining the Sphere (HIC Results)
Routine checklist
Monocular sphere endpoint
Duochrome / max plus check
JCC axis refinement
JCC power refinement
Recheck sphere after cyl
Binocular balance / HIC
Final VA and Rx
On-screen help
User reminder: Present Choice 1, then flip to Choice 2.
Demonstration note
in real life, the Humphriss immediate contrast (HIC) does not make the chart appear doubled. The split view is only shown here to help demonstrate the concept.