Orthoptics: From the Prescription to the End-of-Series Assessment

Few measurements, but they must be recorded consistently

Orthoptics has the distinctive feature of resting on a small number of measurements: visual acuity, a binocular vision assessment, ocular motility, strabismus angle, and degree of amblyopia. That's not much — and that's precisely why rigour is non-negotiable: when a file contains only five data points, one poorly recorded entry throws the entire follow-up off track.

The amblyopic child is the clearest example. Treatment spans months, patching demands a level of family compliance that is genuinely difficult to sustain, and the decision to continue or stop relies on comparing measurements taken weeks apart.

The orthoptic file

• Visual acuity, right eye and left eye, with the correction currently worn;
• binocular vision: convergence, vergences, stereopsis, suppression;
• ocular motility: smooth pursuit, saccades, limitations;
• strabismus: present or absent, type, angle;
• amblyopia: present or absent, depth, eye involved.

These elements complement — rather than replace — the examination carried out by the ophthalmologist who prescribed the therapy. The separation of roles must remain clearly visible in the file: what the ophthalmologist found, and what the orthoptist measures session by session.

Record the conditions, not just the result

A visual acuity of 6/10 means nothing without its context: with or without correction, distance or near, at what distance, using which chart. Two measurements taken under different conditions cannot be compared, and an apparent improvement may be nothing more than a change in protocol.

The same rule applies to compliance: a course of therapy that plateaus because the patch was not worn is not a treatment failure. Documenting what was actually done at home prevents premature conclusions.

From the initial assessment to the end-of-series assessment

The structure is well established: an initial assessment, a series of sessions, then an end-of-series assessment that either closes the case or requests a renewal. Two conditions make that final report straightforward to write.

The first: the initial assessment measurements must be retrievable without digging through the file. The second: the exact number of sessions completed must be on record. A prescription for twenty sessions where it's no longer clear whether fifteen or seventeen were delivered means going back to count — and that recount rarely works in the practitioner's favour.

Scheduling: the backbone of follow-up

Orthoptic therapy depends on regularity. Booking an entire series in one go — fixed days, consistent time slots — holds together far better than scheduling appointments one at a time at the end of each session, and gives families the predictability they need to plan ahead. Unavailable slots, rest days, and already-booked periods should be ruled out at the planning stage, not discovered on the day.

Amblyopia: a race against time

In children, amblyopia treatment has a window: the earlier it begins, the better the outcome, and beyond a certain age the gains become marginal. This constraint has a direct impact on record-keeping: the interval between check-ups is part of the treatment itself. A child seen three months later than planned hasn't simply "missed a session" — they have lost a portion of the expected benefit.

Two pieces of information therefore deserve to be noted at every session: what was done in the clinic, and what was maintained at home. Wearing the patch for two hours instead of six is far from a minor detail; it is the leading cause of treatment failure, and it is better documented than attributed to poor response to therapy.

Working alongside the ophthalmologist

Orthoptic therapy rarely operates in isolation: the ophthalmologist prescribes, adjusts the optical correction, occasionally performs surgery, and expects feedback. That feedback carries more weight when it is concise and data-driven — entry measurements, exit measurements, number of sessions completed, conclusion — than when it is lengthy and descriptive.

The same logic applies in reverse: the optical correction currently worn, the date of the last refraction, and any post-operative considerations must appear in the orthoptic file. An acuity measurement taken with an outdated prescription cannot be meaningfully compared to the previous assessment.

In practice

In the allied health module of Hakim-DZ, the orthoptic assessment includes its five sections, the file retains the prescription and its session quota, and an entire series can be scheduled in one step, automatically accounting for the practitioner's working hours and days off. The assessment prints on the practice letterhead for the referring ophthalmologist.

See the Allied Health page.