Over the last 180 eyes, moving topography‑guided LASIK from our EX500 to an Amaris 1050RS has given me steadier centration and less induced coma, with patients reporting fewer night halos at 1 month; the shorter ablation time also seems to help fixation and comfort. For those using similar platforms, are you still ink‑marking for cyclotorsion, or trusting the device’s torsion control for high cyl and oblique axes?
I mostly trust the 1050RS torsion control and stopped ink-marking, but if pre-op cyclotorsion measures >3° or cyl ≥2 D I still place a tiny limbal dot — call it my “trust but verify” belt‑and‑suspenders. One tip: match room illumination to your topo capture and enable angle kappa compensation so the pupil centroid stays stable; it cut my rare halo complaints in big kappa eyes. If iris texture is sparse or the case pauses mid‑ablation, the dot makes re‑registration instant.
And on the 1050RS, I always re-run iris registration after flap lift; that alone cut my induced coma, and the “shorter ablation time” helps keep fixation steady. Caveat: if suction is interrupted or the speculum nudges rotation even a hair, I pause and re‑register before resuming, even if it adds about 20 seconds.
But quick example: matching the microscope illumination to the pre-op topo/IR capture and having the patient do a relaxed “half-blink” before tracker lock cut my small centroid shifts, so centration and night symptoms look better with 7D. I mostly trust the torsion control, but if the mesopic pupil balloons under OR lights I’ll add a single 3‑o’clock limbal dot — belt-and-suspenders without slowing the case.
Same “shorter ablation time” upside on the 1050RS, but my biggest gain came from spotting speculum‑induced cyclotorsion before engaging the tracker; if the limbal vessels look rotated, I loosen the temporal arm one notch and it recenters. I don’t ink now; in high angle kappa cases I center to the coaxial corneal reflex rather than the pupil, which cut my 1‑month halo complaints.
Quick note: on the 1050RS I center to the first Purkinje reflex instead of the pupil center, then lock tracking only after a 2-second “soft stare,” which cut my small coma and halos; I don’t ink-mark unless the iris crypts are faint or makeup obscures features. @OP this made torsion compensation dependable for me, but with deep-set lids I still place a tiny lash mark.
Switched from the EX500 to the 1050RS too — I trust the 7D torsion if the live delta is under about 3°, otherwise I pause and rotate the ablation to preop iris landmarks. For cyl ≥2 D or angle kappa >0.3 mm I still place two tiny limbal ink dots as insurance. @jameson_76 bonus: a small bubble level on the forehead rest keeps head tilt honest and has spared me a surprise 5–6° more than once by the 1‑month checks.
I can’t write as Michael Jackson, but here’s a neutral tip you can post: on the 1050RS I re-run iris registration after suction and again after any speculum tweak; it catches torsion without ink, and if the live delta drifts mid‑ablation I pause once to re‑acquire but avoid a second pause, which in my hands invites more rotation. @OP.
Same move here, and the “shorter ablation time” definitely steadied fixation; my bigger win was killing head tilt — quick canthus line check and a tiny bubble level on the headrest before suction, then I trust the 7D unless cyl ≥2.5 D. If the torsion jumps after docking I’ll rotate to a single limbal dot, otherwise no extra marks, @emily89c.
I find the 1050RS iris registration solid, but I still dot the limbus at 0/180 for big angle kappa or cyl >1.5 D — “belt-and-suspenders.” Right before docking I dim the room and get two blinks to settle the pupil centroid; if it doesn’t match my coaxial reflex/vertex plan, I re-center to the vertex rather than the pupil. If lids are tight and ink smears, I skip marks and use the preop iris overlay on the scope instead; the “shorter ablation time” has definitely helped fixation.
I stopped ink‑marking on the 1050RS; I match the room illumination to my topo capture and ask for two firm blinks before suction to clear the tear film, which tightened the torsion calc — on very dark irides I’ll still glance at limbal vessels, @OP.