Every chart.
Every patient.

The gold-standard Sloan optotype set — 10 optically balanced letters (C, D, H, K, N, O, R, S, V, Z) rendered as precise geometric vector paths, never fonts. The red indicator marks the active line during exams.

Digits 0–9 for patients unfamiliar with the Latin alphabet or with reading difficulties. Identical precision sizing and vector rendering to Sloan letters.

5 letters per line in precise 0.1 logMAR steps — the ETDRS protocol used in clinical research and trials, with per-letter −0.02 logMAR scoring for statistically valid measurements.

Directional E in four orientations. Ideal for preliterate patients and cross-cultural testing — no literacy or alphabet knowledge required.

Ring with a gap in 8 compass directions — the ISO 8596 reference optotype used worldwide for standardized, internationally comparable acuity measurement.

Four easily distinguished letters for pediatric testing. Children match what they see to a handheld card — a clinical standard for preschool amblyopia screening.

Friendly animal optotypes — the exact artwork from the exam lane — that keep very young patients engaged while still producing reliable acuity measurements.

The full Sloan chart with polarity reversed — white optotypes on black. Useful for glare sensitivity, photophobic patients, and contrast comparisons.

A 7-plate red-green deficiency screening sequence with genuine Ishihara-style dot mosaics — including control plates viewable by all patients.

A fan of 24 spokes at 15° intervals with clock-position labels. Patients report which lines appear darkest, revealing the astigmatic axis.

Bipartite red-green field with mirrored optotypes for fine-tuning spherical correction — when both halves are equally clear, the sphere is optimized.

8 rows of randomized Sloan letters stepping from 96% down to 8% contrast — assessing the vision quality that standard acuity charts miss.

A clean central fixation target for alignment, cover testing, and binocular vision assessment.

The classic four-dot arrangement — red top, green sides, white bottom — for assessing fusion, suppression, and diplopia with red-green glasses.

A 20×20 grid with central fixation dot for macular field screening — patients report any lines that appear wavy, distorted, or missing.

A 19-point dot cluster for Jackson cross-cylinder axis and power refinement, with an optional surround mask for glare control.

A split green/red square outline with central bullseye — an alignment target for binocular coincidence testing in four variants.

Four numbered diamonds — green above and left, red right and below — for binocular balance testing with red-green dissociation.

Green concentric circles with a red crosshair. Under red-green dissociation, the cross position within the rings reveals phoria.

A three-light color discrimination and binocular dissociation target — instantly familiar to every patient.