Tables at a glance

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

Figures at a glance

Figure 1

Figure 2

Figure 3

Table 1

No of case	1	2	3	4
Age(year)	40	40	23	24
Male(M) / Female(F)	F	F	M	M
Right(R) / Left(L)	F	L	R	R
Follow up(months)	18	23	24	30

Table 1: Patients Findings

Table 2

No of case	1	2	3	4
Optic zone(mm)	6.4	6.4	6.4	6.4
Ablation depth(um)Central cornea(original ablation)Peripheral asymmetric ablation (customization ablation)	9676	4670	9060	4550
Residual stromal depth(um)	390	461	444	457
Myopic changes due to LAK(D)	-1.50	-1.75	-1.50	-1.25

Table 2: Intra L-LAK findings
Abbreviations: LAK, laser asymmetric keratectomy; D, dioters

Table 3

Items	Preoperative				Postoperative
No of case	1	2	3	4	1	2	3	4
SE(D)	-4.5	-1.75	-4.75	-2.75	-0.5	0	-0.37	-0.5
Sphere (D)	-4	-1	-3.25	-2.75	-0.5	0	0	-0.5
Cylinder (D)	-1	-1.5	-3	0	0	0	-0.75	0
UDVA (LogMAR)	1	0.8	1	0.9	0	0	0	0
IOP (mmHg)	14	15	16	14	14	16	15	14
Pupil size (mm)	4.7	4.7	4.8	4.2	4.9	4.6	4.7	4

Abbreviations: SE, spherical equivalent; D, dioters; UDVA, uncorrected distance visual acuity; LogMAR, the logarithm of the minimum an- gle of resolution; IOP, intraocular pressure

Table 3: Preoperative and postoperative dermatology

Table 4

Items	Preoperative				Postoperative
No of case	1	2	3	4	1	2	3	4
Keratometry(D)
Mean K	43.75	46.00	45.80	44.30	39.00	44.80	44.80	42.00
Kmax	47.30	48.40	48.20	48.00	40.60	45.20	45.20	44.50
Pachymetry
CP (µm)	577	591	594	562	439	559	501	534

Abbreviations: D, diopters; CP, central pachymetry

Table 4: Comparative keratometric and pachymetric findings between preoperative and postoperative

Table 5

Items	Preoperative				Postoperative
No of case	1	2	3	4	1	2	3	4
SUM (µm)	129	203	168	158	60	62	63	66
DISTANCE (mm)	1.20	0.79	0.88	1.21	0.40	0.1	0.40	0.20
Kappa angle(degree)	4.25	3.68	3.87	4.24	2.21	1.87	2.12	2.20

Table 5: Comparative corneal symmetry findings between preoperative and postoperative

Table 6

Items	Preoperative				Postoperative
No of Case	1	2	3	4	1	2	3	4
TBUT (second)	5.34	4,89	5.56	7.34	14.55	20.22	23.13	16.34
Tear osmolarity (mOsmol/L)	0.75	0.47	0.45	0.64	0.12	0.23	0.32	0.14

Abbreviations: TBUT, tear break out time.

Table 6: Comparative tear film findings between preoperative and postoperative

FIGURE 1

Figure 1: Pre-L-LAK-CXL Orbscan map . Right bottom shows a pachymetric map: an example of measuring the differences in thickness between symmetrically opposed points is shown on the pachymetric map (0–180°, 45–225°, 90–270°, and 135–315°): 0-180°: 13 μm; 45–225°: 19 μm; 90–270°: 49 μm; 135–315°:48 μm; total (SUM): 129 μm. Right top map: Measuring the distance between the maximum posterior elevation (best-fit-sphere; BFS) and the visual axis (DISTANCE :1.20). Corneal apex: temporally deviated (right upper red circle). The thinnest point (X, Y) is indicated by the lower red square, and the posterior high on thicker cornea, and front elevation on the thinner cornea is also shown. Kmax is 47.3 D

FIGURE 2

Figure 2:L-LAK plan
(a). Customization ablation plan (LAK planning) of case 1 of both the thicker peripheral cornea and myopic shift (-1.50 D) on the central cornea due to LAK evaluated by Vision Up software (Well C, Busan, Republic of Korea) on Orbscan II (Bausch & Lomb, Bridgewater, NJ, USA) corneal maps
(b). Original ablation plan of refractive errors (-4.0=-1.0 180^o) of case 1
(c). L-LAK ablation plan (total ablation= original ablation + cus- tomization ablation)

FIGURE 3

Figure 3: Post operatver-L-LAK-CXL Orbscan map. Right bottom pachymetric map: an example of measuring the differences in thickness be- tween symmetrically opposed points is shown on the pachymetric map (0–180°, 45–225°, 90–270°, and 135–315°): 0-180°: 24 μm; 45-225°: 6 μm; 90-270°: 4 μm; 135-315°: 28 μm; total (SUM): 62 μm. Left bottom power map: nasal purple-colored LAK ablation pattern on thicker pe- ripheral cornea. Right top map: shows the measured distance between the maximum posterior elevation (best-fit-sphere; BFS) and the visual axis (DIATANCE: 0.20). Corneal apex: centered (right upper red circle). The thinnest point (X, Y) is indicated by the lower red square. Kmax is 44.8 D