Sagittal Magnetic Resonance Imaging of Dysthyroid Ophthalmopathy

The success rate of TED upper eyelid retraction reoperations

Although reoperation rates for upper lid retraction surgery for thyroid eye disease (TED) typically range between 8% and 23%, there is little literature describing the outcomes of these second operations. In this retrospective observational cohort study, all patients that underwent surgery for upper eyelid retraction over a 14-year period at a single institution were included. Cases were included if a second eyelid retraction surgery was performed during the study period. Success of surgery was defined as a marginal reflex distance (MRD1) of 2.5 to 4.5 mm in each eye and less than 1 mm difference in MRD1 between the eyes. Overcorrection and undercorrection were defined as above and below these bounds, respectively. 72 eyes in 49 patients were included in the study. The mean age was 56.6 (±11.5) years. By definition, all patients had at least 1 lid lengthening surgery for upper eyelid retraction, and at least 1 subsequent surgery. For this second surgery, 61 eyes (85%) underwent retraction surgery and 11 eyes (15%) underwent ptosis surgery. After this second operation, 31% were undercorrected and 33% were overcorrected. A third surgery was performed in 19 eyes (25%), 12 had surgery for residual retraction and 7 for ptosis. After the third operation 10% of eyes were under corrected and 11% were over corrected. Four patients underwent a fourth surgery: one for retraction and three for ptosis. Success was noted in 35% after the second surgery and 44% after the third. Surgical success in eyelid retraction surgery increases from a second to a third consecutive surgery, and residual asymmetry was roughly equally distributed between over- and undercorrection.

Stability of eyelid height after graded anterior-approach lid lowering for dysthyroid upper lid retraction

OBJECTIVE

To investigate the outcome of a modified anterior approach surgical procedure for the correction of primary upper eyelid retraction in thyroid eye disease.

METHODS

A retrospective review of 52 consecutive cases (in 32 patients) of anterior-approach graded upper lid lowering for the treatment of primary eyelid retraction, carried out at Moorfields Eye Hospital between 2006-2009 was conducted. Measurements of upper margin-reflex distance (MRD), upper lid skin crease height and skin fold height were taken from clinical records and photographs. A comparison between pre-operative and both early and late post-operative measurements was conducted, with a maximal follow-up of 12 months. Surgery was considered successful when all of the following criteria were met; an upper lid margin covering 0.5-1.5 mm of the superior cornea in the 12 o'clock position, smooth eyelid contour, skin crease height within 6-10 mm or upper lid skin fold within 2-5 mm of the lid margin, symmetry of lid position (difference in MRD of < 1 mm between both eyes) and patient satisfaction.

RESULTS

A successful outcome was achieved in 86.5% (45/52) of lids with a single procedure. For the whole group, the mean MRD was 7.0 mm pre-operatively and 3.6 mm at 1 month after surgery. The corresponding values from photographic estimates were 6.5 mm and 3.6 mm, respectively. These values remained stable over the maximum follow-up period of 12 months. Under-correction occurred in 6/52 (11.5%) lids, one of which had persistent lateral flare, whereas over-correction occurred in 1/52 (2%).

CONCLUSIONS

The described surgical approach produces reasonably predictable and stable outcome for upper eyelid lowering in patients with thyroid eye disease.

Transconjunctival Müller muscle recession with levator disinsertion for correction of eyelid retraction associated with thyroid-related orbitopathy

PURPOSE

To evaluate the efficacy of transconjunctival Müller muscle recession and graded levator disinsertion for eyelid retraction in patients with thyroid-related orbitopathy (TRO).

DESIGN

Retrospective consecutive case series.

METHODS

Medical record review of 78 TRO patients (107 eyelids) who underwent surgery for upper eyelid retraction in a 5-year period was performed. Main outcome measures were anatomic and functional success, minimal reflex distance (MRD), lagophthalmos, eyelid asymmetry, and patient discomfort.

RESULTS

One hundred seven eyelid retraction surgeries were performed on 78 TRO patients (63 women, mean age 49 years); mean follow-up time was 16.7 months. Upper eyelid position, lagophthalmos, exposure keratopathy, and patients' discomfort markedly improved after surgery (P < .001). Marginal reflex distance (MRD1) decreased an average of 2.6 mm from 6 mm pre-operatively to 3.4 mm post-operatively (P < .001); lagophthalmos decreased an average of 0.6 mm from 1.3 mm pre-operatively to 0.4 mm post-operatively (P = .006) Failure rate was 8.4%, most improved with a second surgery. Overcorrection was noticed in three cases (2.8%). Eyelid asymmetry improved from a mean of 1.0 mm pre-operatively to 0.4 mm post-operatively (P = .001); more than 80% of patients showed eyelid asymmetry of 1 mm or less.

CONCLUSION

Transconjunctival Müller muscle and levator recession is safe and effective in correction of mild, moderate, or severe eyelid retraction in TRO patients. The failure rate is less than 10% and may be addressed by a second surgery.

Controversies in the clinical evaluation of active thyroid-associated orbitopathy: use of a detailed protocol with comparative photographs for objective assessment

Despite many learned publications over recent decades, the assessment of active thyroid-associated orbitopathy (TAO) remains difficult and controversial. There are no biochemical, immunological or imaging investigations which can identify active disease reliably, and clinical assessment is still of paramount importance. We therefore review the strengths and weaknesses of all methods of clinical assessment. A new atlas for clinical assessment of soft tissue signs has been developed, and its reproducibility assessed. It details a suggested protocol that could help standardize descriptions of TAO and allow more objective assessment of its activity and severity. This is relevant to general endocrinologists, who have a crucial role in the identification of patients who require ophthalmological assessment. Certain aspects are more relevant to ophthalmologists and endocrinologists who have a special clinical and research interest in TAO. Unless a reproducible system of assessment is devised and widely adopted, it will remain difficult to interpret research meaningfully, particularly if results appear to contradict.

Palpebral fissure height and downgaze in patients with Graves upper eyelid retraction and congenital blepharoptosis

PURPOSE

To compare the relation between vertical eyelid fissure height and downgaze in healthy subjects and in patients with Graves upper eyelid retraction and congenital blepharoptosis.

METHODS

With a caliper rule, the authors measured the vertical eyelid fissure height of 25 patients with no previous history of eye disease, 34 patients with Graves disease, and 16 patients with congenital blepharoptosis. All measurements were done at the primary position and at four levels of downgaze (10 degrees, 20 degrees, 30 degrees, and 40 degrees). In 13 patients with Graves disease, vertical phoria was quantified with a Maddox rod and prism.

RESULTS

The relation between vertical eyelid fissure height and downgaze is linear. The slope was identical for the control subjects and for the patients with Graves disease (b = -1.36) but it was almost zero for the patients with congenital blepharoptosis (b = -0.037). When vertical eyelid fissure height was corrected to arc values, the slope of the relation between vertical eyelid fissure height and downgaze was significantly greater for the patients with Graves disease. Vertical phoria was not related to the amount of Graves upper eyelid retraction.

CONCLUSIONS

The data support the hypotheses that upper eyelid retraction secondary to Graves eye disease results from hyperactivity of the levator palpebrae superioris muscle.