Diamond burr superficial keratectomy with mitomycin C for corneal scarring and high corneal astigmatism after pterygium excision

Figures & data

Figure 1 Appearance of case 2 (A) before and (B) six months after surgery.

Figure 2 Appearance of case 3 (A) before and (B) six months after surgery.

Figure 3 Corneal topography of case 1 (A) before and (B) six months after surgery.

Figure 4 Corneal topography of case 2 (A) before and (B) six months after surgery.

Table 1 Visual and refractive changes in patients before and six months after surgery

Case	Age/gender/eye	UCVA		BSCVA		K1-K2/cylinder		Refraction
		Preop	Postop	Preop	Postop	Preop	Postop	Preop	Postop
1	51/M/R	0.1	0.7	0.3	0.9	38.3–43.5/−5.28	40.2–42.0/−1.79	+6.50–8.0 × 154	+1.0–1.50 × 25
2	55/F/R	0.3	0.9	0.5	1.0	42.2–46.5/−4.35	44.4–45.3/−0.92	+4.50–6.0 × 15	+0.50–1.25 × 100
3	56/M/L	0.2	0.8	0.5	1.0	38.2–46.7/−8.57	43.1–44.2/−1.11	+6.0–7.0 × 30	+1.0–1.25 × 140
4	62/F/L	0.2	0.7	0.4	0.9	36.5–46.9/−10.4	42.3–44.2/−1.84	+4.50–7.0 × 10	+0.50–1.75 × 30

Abbreviations: UCVA, uncorrected visual acuity; BSCVA, best spectacle-corrected visual acuity; K, keratometry; M, male; F, female; R, right; L, left; preop, preoperatively; postop, postoperatively.

Table 2 Higher order corneal aberrations in patients before and six months after surgery

Case	Higher order RMS (μm)		Astigmatism RMS (μm)		Coma (μm)		Trifoil (μm)		Spherical aberration (μm)
	Preop	Postop	Preop	Postop	Preop	Postop	Preop	Postop	Preop	Postop
1	2.33	1.63	5.50	1.95	1.67	0.07	0.44	1.14	0.87	0.12
2	2.28	0.77	3.50	0.70	0.44	0.38	1.80	0.50	0.52	0.29
3	4.43	1.11	5.39	0.91	0.95	0.31	1.15	0.66	6.15	1.36
4	6.55	1.42	6.16	1.07	0.51	0.38	4.56	0.87	1.66	0.23

Abbreviations: RMS, root mean square; preop, preoperatively; postop, postoperatively.