Correction of Residual Hyperopia After Cataract Surgery ... - Iogen

TABLE 4. Accuracy of Sphere to Target – Hyperopic Corrections in Patients With Light
Adjustable Intraocular Lens Technology
Sphere
One Day Post Lock-In
refraction spherical equivalent presented in Table 5 demonstrating
no significant change was induced on cylinder.
● STABILITY OF REFRACTIVE ADJUSTMENT: One hundred
percent (14/14) of the eyes were stable within 0.25
D with 13 eyes showing no change at one to six months
follow-up visits as compared with refraction at one day
after lock-in treatment (Table 6). The mean rate of change
was 0.006 D per month, which is six times more stable
than that of refractive procedures. 19
● STABILITY OF UNCORRECTED VISUAL ACUITY: All
eyes demonstrated stability of uncorrected visual acuity
(UCVA) after lock-in. The bar graph of UCVA before
and after refractive adjustments is shown in Figure 3. The
data demonstrated significant improvement in UCVA for
64% of the 14 eyes and the UCVA is stable for a follow-up
period up to six months. Seventy-one percent (10/14) of
eyes achieved UCVA of 20/25 or better. All eyes were
20/30 or better. The four eyes that did not achieve UCVA
Three Months
Postoperative
Six Months
Postoperative
n/N % n/N % n/N %
% within 0.25 D of attempted 13/14 92.9% 13/14 92.9% 8/9 88.9%
% within 0.50 D of attempted 14/14 100.0% 14/14 100.0% 9/9 100.0%
% within 1.0 D of attempted 14/14 100.0% 14/14 100.0% 9/9 100.0%
D diopters.
TABLE 5. Accuracy of Manifest Refraction Spherical Equivalent to Target – Hyperopic
Corrections in Patients With Light Adjustable Intraocular Lens Technology
MRSE
One Day Post Lock-In
Three Months
Postoperative
Six Months
Postoperative
n/N % n/N % n/N %
% within 0.25 D of attempted 13/14 92.9% 13/14 92.9% 8/9 88.9%
% within 0.50 D of attempted 14/14 100.0% 14/14 100.0% 9/9 100.0%
% within 1.0 D of attempted 14/14 100.0% 14/14 100.0% 9/9 100.0%
D diopter; MRSE manifest refraction spherical equivalent.
TABLE 6. Stability of Refractive Adjustment in Patients
With Light Adjustable Intraocular Lens Technology
Change of Refraction (D) Number of Eyes Total 14 Follow-up Time (mos)
0 13 1–6
0.25 1 1–3
D diopters; mos months.
of 20/25 or better had residual astigmatism that was not
treated.
● STABILITY OF BEST-CORRECTED VISUAL ACUITY: BCVA
before and after refractive adjustments is displayed in
Figure 4. All 14 eyes were stable and able to maintain
their preadjustment BCVA following refractive adjustment
and lock-in treatments with follow-up time up to
six months.
● COMPLICATIONS: Any adverse events or complications
were recorded. In addition to typical adverse events associated
with IOLs, we looked carefully for evidence of
uveitis, UV keratopathy, elevated intraocular pressure,
posterior capsular opacity, glare, and halos. There were no
adverse events or complications reported.
DISCUSSION
HYPEROPIC REFRACTIVE ERROR AFTER CATARACT SURgery
is particularly undesirable since affected patients have
no clear uncorrected far point. Residual hyperopia is
particularly common after corneal refractive procedures
where preoperative keratometry measurements are unreliable.
Despite a wide array of empirical formulas, IOL power
remains difficult to predict in patients who develop cataracts
after refractive surgery. Herein, we demonstrate
feasibility of correcting residual hyperopic error after cataract
surgery using the light adjustable lens technology.
VOL. 147, NO. 3 PSEUDOPHAKIC HYPEROPIA CORRECTION
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