BTS Opticien-Lunetier cheat sheet
BTS Opticien-Lunetier · Keep the key ideas within reach.
Geometrical and physical optics with explicit models
State units, sign convention and model assumptions first.
Measure refraction angles from the specified normal.
Prism direction depends on geometry as well as magnitude.
Theoretical optical limits are not complete clinical performance predictions.
Ophthalmic systems, materials, fitting and verification
Verify identity, prescription, measurements and actual fit together.
Check transposition through the principal meridian powers.
Use the correct design-specific reference points and instructions.
Material advantages do not imply universal safety or immunity to damage.
Vision analysis, physiological foundations and referral limits
Relate measurements to the person’s symptoms and tasks.
Treat accommodation and reserve formulas as bounded models.
A spherical equivalent does not reproduce every cylinder correction.
Contact-lens properties do not remove the need for safe fit, care and referral.
French optical practice, communication and management
Distinguish BTS competencies from foreign certification and medical scope.
Check first delivery, renewal and adaptation conditions separately.
Explain estimates and coverage without universal reimbursement promises.
Keep margin definitions, tax bases and calculation assumptions explicit.