In this study, we aimed to evaluate changes of vertical palpebral fissure height （VPFH） after unilateral lateral rectus muscle recession. Twenty-five and twenty-six patients who were candidates for lateral rectus mu...In this study, we aimed to evaluate changes of vertical palpebral fissure height （VPFH） after unilateral lateral rectus muscle recession. Twenty-five and twenty-six patients who were candidates for lateral rectus muscle recession were assigned into “with” and “without” intermuscular septum dissection study arms. The VPFH was measured at one-day before surgery and in two weeks and three months, postoperatively. Three months after surgery, significant increase of VPFH was observed in both groups （Paired t-test; P=0.005）. Also, less widening of VPFH was observed in “with intermuscular septum dissection” group （Change in VPFH in “with intermuscular septum dissection” vs “without intermuscular septum dissection” groups： 0.48 mm vs 1.34 mm; ANCOVA test; P〈0.001）. However, such results were not observed two weeks post-operatively （Change in VPFH in “with intermuscular septum dissection” vs “without intermuscular septum dissection” groups： -0.28 mm vs 0.28 mm; ANCOVA test; P=0.302）. Intermuscular septum dissection is recommended in lateral rectus muscle recession to partially prevent the undesirable increment of VPFH.展开更多
The information on the force of extraocular muscles(EOMs)is beneficial for strabismus diagnosis and surgical planning,and a direct and simple method is important for surgeons to obtain these forces.Based on the tradit...The information on the force of extraocular muscles(EOMs)is beneficial for strabismus diagnosis and surgical planning,and a direct and simple method is important for surgeons to obtain these forces.Based on the traditional model,a numerical simulation method was proposed to achieve this aim,and then the active force of the lateral rectus(LR)muscle was successfully simulated when the eye rotated every angle from 0°to 30°in the horizontal plane from the nasal to the temporal side.In order to verify these simulations,the results were compared with the previous experimental data.The comparison shows that the simulation results diverged much more than the experimental data in the range of 0°–10°.The errors were corrected to make the simulation results closer to the experimental data.Finally,a general empirical equation was proposed to evaluate the active force of the LR muscle by fitting these data,which represent the relationship between the simulation forces and the contractive amounts of the LR muscle.展开更多
基金supported by Isfahan University of Medical Sciences
文摘In this study, we aimed to evaluate changes of vertical palpebral fissure height （VPFH） after unilateral lateral rectus muscle recession. Twenty-five and twenty-six patients who were candidates for lateral rectus muscle recession were assigned into “with” and “without” intermuscular septum dissection study arms. The VPFH was measured at one-day before surgery and in two weeks and three months, postoperatively. Three months after surgery, significant increase of VPFH was observed in both groups （Paired t-test; P=0.005）. Also, less widening of VPFH was observed in “with intermuscular septum dissection” group （Change in VPFH in “with intermuscular septum dissection” vs “without intermuscular septum dissection” groups： 0.48 mm vs 1.34 mm; ANCOVA test; P〈0.001）. However, such results were not observed two weeks post-operatively （Change in VPFH in “with intermuscular septum dissection” vs “without intermuscular septum dissection” groups： -0.28 mm vs 0.28 mm; ANCOVA test; P=0.302）. Intermuscular septum dissection is recommended in lateral rectus muscle recession to partially prevent the undesirable increment of VPFH.
基金supported by the National Natural Science Foundation of China(Grant No.11032008)
文摘The information on the force of extraocular muscles(EOMs)is beneficial for strabismus diagnosis and surgical planning,and a direct and simple method is important for surgeons to obtain these forces.Based on the traditional model,a numerical simulation method was proposed to achieve this aim,and then the active force of the lateral rectus(LR)muscle was successfully simulated when the eye rotated every angle from 0°to 30°in the horizontal plane from the nasal to the temporal side.In order to verify these simulations,the results were compared with the previous experimental data.The comparison shows that the simulation results diverged much more than the experimental data in the range of 0°–10°.The errors were corrected to make the simulation results closer to the experimental data.Finally,a general empirical equation was proposed to evaluate the active force of the LR muscle by fitting these data,which represent the relationship between the simulation forces and the contractive amounts of the LR muscle.
